In its first 25 years of existence, the Commission designated 856 buildings, 79 interiors and 9 parks or other outdoor places as landmarks, while declaring 52 neighborhoods with more than 15,000 buildings as historic districts.[1] As of May 30, 2017[update], there are more than 36,000 landmark properties in New York City, most of which are located in 141 historic districts in all five boroughs.