Given the 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. Roy Grounds House - The Roy Grounds House is located at 24 Hill Street Toorak in Melbourne Australia. It was designed by Sir Roy Grounds as his own home for his wife Betty and himself. This building was constructed in the early 1950s during the period of architectural experimentation on materiality and structure in houses. The Roy Grounds House was designed as a prototype for Roy's latter project 10 years later on the National Gallery of Victoria (NGV) located on St.Kilda Road Melbourne.
The answer is:
Building