In Barcelona's Eixample district, young firm Built Architecture updated a historic 19th-century flat with an eye towards preserving its colorful mosaic tile floors, which date back to the early 1900s. In the dining room, a sculpture by Laurent Martin Lo hangs suspended above the table. Photo 1 of 9 in A Multifunctional Built-In Updates this Mosaic-Filled, 19th-Century Spanish Flat by Aileen Kwun

A Multifunctional Built-In Updates this Mosaic-Filled, 19th-Century Spanish Flat

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In Barcelona's Eixample district, young firm Built Architecture updated a historic 19th-century flat with an eye towards preserving its colorful mosaic tile floors, which date back to the early 1900s. In the dining room, a sculpture by Laurent Martin Lo hangs suspended above the table.