Tina Seidenfaden Busck: I had been acting as an interior design and art adviser for private clients for a while and wanted to create a space where I could showcase a curated selection of vintage pieces as well as works of the contemporary designers whom I admire. The idea of creating the Apartment, a gallery laid out like a private home, took form when this place—an 18th-century, 2,600-square-foot apartment in Christianshavn in dire need of renovation—became available. I want the Apartment to look and feel like a place where people can imagine sitting down to dinner or reading a book. The same goes for my own home [two floors up]: I like the fact that you can see that we all live there—me, my husband, and our three children—plus all the quirky combinations that come with being a family. The Apartment has a very classic Hammershøi-like layout, with wood paneling, original hardwood floors, and lots of light. My own home has a slightly less classic feel: It’s a duplex with sloping walls and an open-plan layout.

My father was a fashion designer; he was very into decorating our home, and he used a lot of colors. And I grew up in a family that collected contemporary art, so I’ve always been going to auctions. My ten years at Sotheby’s and time at Andersen’s Contemporary—representing artists like Olafur Eliasson and Tomás Saraceno—have given me a good in-depth knowledge of today’s art and design market.

At the Apartment, I aim to showcase beautiful objects that maintain and increase in value over time. I have an eclectic taste, although with a very soft spot for Italian and Swedish design from the 1950s. Designs [from those eras and regions] have an experimental and friendly edge to them that I like, not to mention exquisite craftsmanship and materials.

There is no such thing as a “perfect” mix. However, the main components at the Apartment and in my own home are a mix of 20th-century vintage furniture and selected contemporary pieces, like McCollin Bryan’s Lens tables, lighting by Michael Anastassiades, vintage Berber rugs and patchwork quilts, and rattan. I love the way rattan was used in the mid-century to create elegant and accessible furniture. I’ve also been collecting contemporary art forever, and art is a dominant feature in my own home—together with our book wall and lots of souvenirs important to our family. In short: Keep it personal and try to incorporate elements with history that’s significant to you.

I of course appreciate Danish modern. That heritage is a very big part of our DNA in Denmark. But having worked and lived abroad for many years, I fell in love with foreign designers. And Finn Juhl and Arne Jacobsen would not have been who they were—masters—without also looking abroad.

One of my favorite aspects of running the Apartment is being able to work with contemporary designers, like Michael Anastassiades, whose work I respect immensely. The timelessness of his designs, the outstanding craftsmanship and exquisite materials. I am so happy to show his work in Scandinavia. We also exhibit Ilse Crawford’s furniture collection for De La Espada—I’ve admired her interior designs for years. For more avant-garde pieces, we carry McCollin Bryan, two English designers with a distinct, playful approach to design and an uncompromising quality.

Small spaces require functional furniture more than larger spaces do, but they also enable you to create a much more dramatic interior. You can make them very dark or very light, very playful or very formal. Overall, these spaces should hold only a limited amount of furniture—for instance, a daybed, a foldout table, an eye-catching ceiling light, or wall-mounted sconces.

People undervalue lighting. It gives a lot of atmosphere and creates coziness. With a mix of table, ceiling, and floor lamps, you get light coming from various angles. You can decide what to have on in the daytime and the evening, then play with the theme. In the Apartment now, we combine a 1950s Italian glass pendant with Azucena floor lamps, a Michael Anastassiades tube wall light, and LED lights from Le Deun Luminaires. This fall, Flos is doing a limited edition of Achille Castiglioni’s Snoopy table lamp especially for us, and I can’t wait to get one for my own study.

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A Curated Apartment Turned Showroom in Copenhagen