Please answer the following question: 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. Palazzo del Viminale -  The Palazzo del Viminale is an historic palace in Rome (Italy) seat of the Prime Minister and of the Ministry of Interior since 1925; in 1961 the Prime Minister was transferred to Palazzo Chigi.
Answer:
Building