Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Ladd Carriage House - The Ladd Carriage House is a building in downtown Portland Oregon. It is one of the few surviving pieces of the former grand estates which once existed in the downtown core. It was on the National Register of Historic Places from 1980 until 2008. It was restored to the list in 2010.The building served as an outbuilding to the William S. Ladd mansion once located across Broadway on the block now occupied by The Oregonian's headquarters.
Answer:
Building