Here are some photos of the former Olive Street Terra Cotta District - the 600 block of Olive, across the street from the Railway Exchange Building. These beautiful terra cotta-sheathed buildings were named to the National Historic Register in 1986, which would have made them eligible for historic renovation tax credits had they not been torn down for a surface parking lot in a ridiculously short-sighted move.
The first photo shows the Gill Building, which still stands today (despite the efforts of the May Company) and was recently renovated.
On the other side of the parking garage were the Tower Building, which was home to Boyd's department store (then the city's foremost purveyor of men's furnishings), the former Erker Optical Building, and the elegant 610 Olive Building.
Sixth and Olive would be such an amazing intersection had these buildings been preserved.