Hilary Mork, AIA, Named Associate Principal

We are thrilled to announce the promotion of Hilary Mork, AIA, to the position of Associate Principal! ⁠

Hilary was the first-ever intern for our firm in 2011. She gained experience at firms in both Chicago and Richmond before returning to Pennsylvania and to Period Architecture. Hilary brings a personal touch to each design. Skilled in creating detailed millwork, innovative solutions and honoring architectural precedent, her designs create a feeling of home. As Associate Principal, we look forward to her continued creativity, leadership, and mentorship to the next generation of architects within our offices.⁠

“From my very first day as an intern here, I felt strongly that this was exactly where I belonged.  And when I came back after time out of state, it felt like coming home,” Hilary explains. “We have so much talent in the firm right now, its incredibly exciting to see the beautiful work that is being produced!  I can’t wait to see what the future holds for us as a team.”

Please join us in congratulating Hilary!

Thank You!

That’s a wrap on 12 Days of Giving!

We are overwhelmed with the response from our clients, partners, friends and family. Thanks to you we were able to donate over 200 toys to CityTeam in just 12 days! Words cannot express our gratitude! We look forward to coordinating another toy drive in 2023!

If you’re interested in learning more about CityTeam visit their website at CityTeam.org

Trumbauer Awards

Period Architecture accepted two design awards at the 2022 Trumbauer Awards presented by the Philadelphia Chapter of Institute of Classical Architecture & Art. Accepting the awards on behalf of the firm was Principal, Joseph Mackin, on Thursday, November 3rd at the Union League of Philadelphia. The firm was awarded the top honors in New Residential Architecture Over 5,000 Square Feet for Hilltop Residence and New Residential Architecture Under 5,000 Square Feet for Chimney Hill Residence.

“It is an immense honor to be recognized by the Institute of Classical Architecture & Art for one home, let alone two,” stated Joseph Mackin. “The Trumbauer Awards are one of the highest distinctions for traditional design in our region and we are humbled by these commendations.”

Hilltop Residence in Greenville, Delaware, evokes the expression of an eighteenth-century Pennsylvania farmhouse that has developed over time. “When we asked the homeowners their design goals for this home, they simply requested a home primed for a visit from George Washington himself,” Principal Jeffrey Dolan explained. Traditional details are found throughout the exterior and interior spaces with special care in designing period millwork and the incorporation of reclaimed materials. The judges remarked, “This design showed restraint. Sometimes it’s not what we put in, but what we leave out which makes for an award-winning design.”

Inspired by Colonial Williamsburg, Chimney Hill Residence sits atop a hill next to a well-traveled road leading to the historic borough of West Chester, Pennsylvania. “With such a prominent location, we were given the unique opportunity to create two frontages for this home,” says Mackin. The Dutch-Colonial style features one formal frontage with an “original,” center hall, five-bay mass, and one informal family frontage with a private courtyard and gardens. “It is the detailing and the massing that gives this period house it’s character,” the judges noted.

The Biennial Trumbauer Awards honor exemplary design that preserves and advances the classical tradition. Named for internationally renowned architect, and Philadelphia native, Horace Trumbauer, these awards recognize contemporary projects that express the breadth and inclusiveness present in his work. This year’s awards were open to the members from the Philadelphia, Ohio & Lake Erie chapters of the ICAA with submissions from Pennsylvania, Michigan, Ohio, New Jersey, New York, Delaware and Maryland.

How to Make Your Outdoor Living Space Feel like a Vacation

As the temperatures continue to rise, outdoor living spaces become key to true summertime enjoyment. While you soak up the sunshine, think ahead to next summer and how you may be able to better utilize your outdoor oasis. After all, a yard is a special place of refuge and we believe you deserve to enjoy it in style and comfort.

Whether you’re looking to build a new house or create an addition to your existing one, these outdoor living ideas will undoubtedly increase your enjoyment of your home. In fact, these upgrades may have you feeling like you’re living in a luxury hotel—just without the room service.

Covered Porches

Imagine throwing open your doors and, with a steaming mug of coffee in hand, lounging on your covered porch while enjoying fresh air, birdsong, or the comforting hush of summer rain. This is the beauty of a covered porch. It seamlessly connects the interior of your home with its outside surroundings and does so while providing protection against damaging UV rays or inclement weather. And, for those who like to host parties, these types of porches also enhance a guest’s experience because they can easily transition from the inside space to the outside one without having to worry about the weather.

A tip from our team: If you’re building a covered porch as an addition to your home, it is imperative that it’s design transitions smoothly from the original building.

This covered porch, designed for a homeowner in Westover Hills, Delaware, provides an uninterrupted experience with the backyard. For added comfort, we included retractable screens to help keep the space bug-free in the summertime.


If you ask a child, the advantages of a backyard pool are obvious: pool parties and playtime that lasts all day in the summer. However, having a pool in your backyard comes with other benefits as well.

From a design perspective, a pool provides an easy and beautiful addition to the yard from which to build around. But its impact on health is even more valuable than its design function. Several research studies have found that the presence of water in architectural design can improve concentration and memory and decrease heart rate, blood pressure, and rates of stress. In addition, a pool is a great-low impact exercise for just about everyone. We can’t think of a better way to help you feel like you’re relaxing in the lap of luxury than by floating in your own Caribbean blue-colored pool.

A tip from our team: Before designing a pool, consider how you want to use your backyard space in its entirety. This will help inform the size, location, orientation, and design of the pool itself as well as the design of the surrounding areas.

The design of this Key Largo, Florida, home was inspired both by its tropical Floridian surroundings as well as the British West Indies architectural style.

Entertainment Barns

Luke Brian and Jason Aldean both have something in common aside from being A-list country crooners: they also have stunning entertainment barns on their properties. For people like these singers who are big on hosting guests, an entertainment barn allows them to put some space between their guests and the sanctity of their living spaces.

And, despite the name, an entertainment barn has many uses outside of being a private event venue. They can also be used as an overnight guest house, a detached office space, a workshop, a game room for adults, a playroom for kids, a “classroom” space for artists and creatives, or a place to host parent meetings, book clubs, or garden parties. However you intend to use it, an entertainment barn is the ultimate private luxury retreat that you’ll never have to travel to.

A tip from our team: When building an entertainment barn, you will want to work with an architect who will be able to connect it to the rest of your property in a cohesive and natural way. The best way to do this is to select certain styles from the private areas of your home to incorporate in your entertainment barn. To learn more about our tips on barn design, visit The Art of the Barn.

When designing a new residence in West Chester, Pennsylvania, we were asked to include a separate space for hosting events. The end result was this cozy entertainment barn.

Bring The Vacation to You

It is important to remember that your home living space isn’t confined to what’s between the front and back doors. Your outside living space should feel as inviting and comfortable as your living room. So, whether you choose one of these options or all three, we have no doubt you will revel in the added luxury of your home as you lounge in your new outdoor space.

Design Spotlight: The Classic Pennsylvania Farmhouse

There is something magical about walking into a traditional Pennsylvania farmhouse home. The sandstone and granite walls feel solid and expansive. They stand like broad-shouldered guards defending against not just the cold but also the ills of the world. The inviting and gently winding central staircase unfolds with delightful secrecy into the warm depths of the home. Elaborate strap hinges and beading around the windows hint at simpler times when everything was handmade with dedicated precision by expert craftsmen. And, of course, each etch in the worn wooden flooring speaks of decades of lives lived and unknowable stories of the past.

It’s hard to experience a home like this and not get carried away by its charm. Frequently, homeowners who grew up in this kind of home come to us wanting to carry on that tradition into their own growing families. Others have simply fallen in love from a distance. Regardless of their personal histories with these homes, the masterful architect behind this style, Richardson Brognard Okie, is so infrequently talked about that few homeowners know anything about him or understand the intricacy of his work.

This lack of understanding means homeowners are not able to identify what parts of this style they want to capture in their own new homes. Since many homeowners come to us wanting to design in this colonial revival style, we are going to explore Okie’s history and architectural signatures so that you can better acquaint yourself with the craftsmanship and detailing of his homes. Doing so will likely give you deeper insight into how to approach the design of your new colonial revival home.


Richardson Brognard Okie (1875-1945) was known as an architectural artist and master builder. Colleagues praised his work saying it epitomized the American way of life because his buildings were of the highest quality — a result of his unrelenting desire for perfection — and yet were still modest and unassuming.

Born and raised in Camden, New Jersey, he moved to Philadelphia after graduating from the University of Pennsylvania in 1897 with a degree in architecture. Okie had always had a close connection to the countryside and, after his move to Pennsylvania, this seems to have translated into a deep appreciation of the region’s copious farmhouses.

Early in his career, Okie was known to travel around the Pennsylvania countryside hunting for early Dutch buildings with his son in tow and a ruler in hand. When he found a particularly distinctive structure, Okie would pore over every detail of it, measuring everything he could and collecting castoff hardware. This is how he became fluent in the language of these iconic homes.

Okie’s fluency in Pennsylvania farmhouses eventually paid off spectacularly. Some of his more notable clients included the Pew family, the DuPont family, the former Associate Justice of the Supreme Court, Owen J. Roberts, and the former United States Attorney General, Philander C. Knox. He was also commissioned to restore Betsy Ross’ house and William Penn’s country home, Pennsbury Manor.

Overfields Farm is a 1912 Berwyn home that benefitted from a addition and renovation designed by R. Brognard Okie in 1927. It is currently undergoing a complete restoration and renovation by Period Architecture.


Due to his thoughtful designs, there are signature details in Okie’s colonial revival homes that make his buildings easy to identify. “What is deceiving about an Okie-design is the simplicity,” President and Co-Founder Joe Mackin comments. “The detailing throughout, whether visible or realized through everyday use, is incredibly thoughtful and truly discovered within his drawings and notes.”

Stepping inside an Okie home is where you will be able to spot the most unique elements of his designs. Pay attention to the millwork, mantelpieces, and staircases. Okie infused these three elements, in particular, with his own signature style.


Okie had fun with the millwork in his homes and used these details everywhere. Look closely and you’ll notice: intricate beading on window shutters, door frames, walls, cabinets, and even stair banisters; distinctive semicircular doorstops behind every door; and creative zig-zagging woodwork holding up bookcase shelves known as saw-tooth shelving.

From the rattail hinges to the sawtooth adjustable bookshelf railing, the millwork throughout the Standfast Residence showcases the playful spirit found in Okie homes.


Many of the mantelpieces in Okie’s homes were inspired by the historic mansions in Germantown, PA. You’ll notice that he uses bolection molding and a decorative design technique called punch and gauge to intricately decorate his mantelpieces.

The Parlor Room of the Berwyn Residence features a detailed molding mantelpiece. This was one of the more ornate styles Brognard Okie utilized when designing fireplace mantels.


The staircases are the heart of every Okie home. Most modern houses use a staircase to simply get someone from one floor to the next but, in an Okie home, the staircase strategically and seamlessly connects every section of the house. This means the main staircase will likely bring you to a half floor, servant’s wing, balcony, and second-floor landing all in a short distance.

Welcoming, yet refined, this Chester County Farmhouse staircase carries a rustic simplicity to it’s design while remaining a centerpiece to the home.

Of course, Okie’s attention to detail doesn’t stop with the interior of the house. The exteriors of his homes also have classic signatures from unique shutters and fieldstone walls to precisely scaled porches and dormers. In addition, Okie was also consistent in the orientation, nestling, scale, and form of his homes. While these elements are not unique to him, paired with the interior and exterior elements outlined above they can become an excellent indication of whether you are in the presence of an Okie home.


A mark of a good architect is a conscious understanding of the best orientation of a building. Designing a house to get the best southern exposure not only gives it the best views and ventilation but also allows warm sunlight to enter the house for most of the year. Okie had an innate understanding of orientation. Most of his homes have large, southern-facing double-hung windows and Dutch doors to maximize the amount of sunlight and air entering the house. He would also align all the doors inside the home so that, when windows were open in the summertime, fresh air could filter through and cool the entire home.

The Dutch door in this Berwyn Residence brings a farmhouse detail while aiding in natural circulation throughout the first floor of the home.


Positioning a house at a high elevation point to get good views is a modern concept. Well before Okie’s time, home builders would build at lower elevations and try to embed their homes into the land to get the most protection from harsh weather conditions. Okie embraced this practice and did so with amazing ingenuity. He would nestle a home into the side of a hill in a way that managed to protect the home while still delivering beautiful views. It was this nestling technique, and the variety of elevational changes it caused, that forced Okie to engineer his unique staircases.

Nestled among mature landscaping, the Unionville Residence is protected from the elements, while taking advantage of the bucolic views from every corner of the home.


Okie had no interest in creating hulking mansions. Instead, he would create spacious, overlapping wings that unfolded into the landscape. Each wing was designed in a slightly different way so that the entire home looked like it had evolved over time.

While brand new construction, the Unionville Residence appears to have grown over time with two wings on either side of the main stone structure. This is the technique Okie utilized to create a sense of maturing over time even though being built from scratch.


Okie never just recreated an old farmhouse. He studied the past and then infused it with his own creativity to make a unique design.

It’s in this way that Okie influences our firm’s work the most. Today’s residential styles have evolved drastically since Okie’s time, so when a homeowner asks us for an Okie-style house we need to find novel ways to blend historic farmhouse charm with the more modern living styles of our era. This means we, too, never just recreate a historic house. What we do is transform serpentine back hallways into more open living areas, rework staff quarters into cozy guest bedroom suites, and creatively hide modern elements behind old-world design. In other words, we are using history as inspiration and adding our own twist to create something new, unique, and tailored for each client.

In a word, Okie’s biggest focus was always on simplicity. He wanted each of his homes to have a vernacular feel. And this is yet another of the many ways he has influenced our work. We’ll let you in on an architectural secret: things that look simple are usually inordinately complex to design and build. Yet we understand and share Okie’s dedication to aesthetic simplicity, and commit ourselves to it for every project we touch.

Long before we started our firm in 2010, we each had a deep appreciation for Okie’s work. His dedication to detail and cohesion has been — and continues to be — a major source of inspiration to each of us in how we approach our designs. Now that you, too, have a better understanding of Okie’s work, we hope you’ll feel empowered to embrace your new home project with confidence.

fieldstone home in horsham near talamore country club


If you’d like to see our Okie work in action, take a look at the homes listed here. This list includes a mix of original Okie homes that we delicately modernized for the needs of today’s families and homes that we designed from scratch in the Okie style.