Olympia hasn't always been how it is today, and not even the Capitol Campus has changed a bunch in the last 100 years.

Olytimeling.org chronicles the changing arrangement of the Capitol Campus (and hopefully more of Olympia in the future). Their article on the Old St. Pete's is pretty illustrative of their work:

Built in 1887, St. Peter Hospital was torn down in 1919 to make room for more Capitol Buildings. Google Earth overlayed with a 1908 Olympia Sanborn map shows that St. Peter Hospital faced 11th Avenue between Water and Columbia Streets. This would face what is now the General Administration building.

The Sisters of Providence raised money to build the hospital by soliciting donations from surrounding logging camps. They would sell hospital insurance as tickets of admission for use in times of need. Because of the dangerous nature of logging taking place in Puget Sound, these insurances proved useful. A Native American story pole, built by Chief William Shelton, stands in its place.

Their overlay of 1908 Olympia and the campus shows not only the old city street grid on what is now the green capitol lawn, but an old ravine that used to cut through much of the campus.

Click image for larger version.

Interesting stuff over there, head over and explore.