Dekum Building

The Dekum
U.S. National Register of Historic Places
Portland Historic Landmark
The Dekum Building circa 2007.
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Location	505–519 SW 3rd Avenue Portland, Oregon
Coordinates	45°31′10″N 122°40′31″W / 45.519464°N 122.675225°W / 45.519464; -122.675225Coordinates: 45°31′10″N 122°40′31″W / 45.519464°N 122.675225°W / 45.519464; -122.675225
Built	1891–92
Architect	McCaw, Martin and White
Architectural style	Romanesque
NRHP reference #	80003363
Added to NRHP	October 10, 1980

The Dekum or the Dekum Building is a historic office building in downtown Portland, Oregon, United States. It was listed on the National Register of Historic Places in 1980.

With its rusticated sandstone base, over-scaled arches at street level, and stone carvings, the eight-story building is a strong example of Romanesque Revival architecture. It was made completely from materials found in Oregon. Completed in 1892, it is named after Frank Dekum, a German immigrant who opened Portland's first candy shop. Construction cost $300,000 in 1892 dollars. During construction, masons reportedly consumed beer instead of the usual coffee.