DePauw University consists of 36 major buildings spread out over a spacious 655 acre (2.7 km²) campus that includes a 480 acre (1.9 km²) nature park, and is located approximately 45 miles to the west of Indianapolis, Indiana. There are 11 residence halls, 4 theme houses, and 31 University-owned houses and apartments spread throughout the campus. The oldest building on campus, East College, was built in 1877 and is listed on the Register of Historic Landmarks. DePauw is also home to McKim Observatory.