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. Hillsborough Castle - Hillsborough Castle is an official government residence in Northern Ireland. It is the residence of the Secretary of State for Northern Ireland and the official residence in Northern Ireland of Queen Elizabeth II and other members of the British Royal Family when they visit the region as well as a guest house for prominent international visitors. From 1924 until 1973 it was the official residence of the Governor of Northern Ireland.
The answer to this question is:
Building