Native Chicagoans, like me, remember when State State in downtown Chicago was known as The Great Street, before there was a Magnificent Mile on the north side of the Chicago River. It was the street of Marshall Field's, the Chicago Theater, the Palmer House and Carson, Pirie, Scott and Company. Today, Carson's is known as the Sullivan Center, a 943,944-square-foot, three-building complex that houses the School of the Art Institute of Chicago and national retailer Target. Located at 1 South State Street, at the corner of East Madison Street, the structure is mostly known for its architecture. It was designed by Louis Sullivan in 1899 for a retail firm. Another famous architect, Daniel Burnham, also did work on the building. It is remarkable for its steel-framed construction, which allowed a dramatic increase in window area created by bay-wide windows, which in turn allowed for the greatest amount of daylight into the building interiors. The design was the first use of what became known as the Chicago window. At street level, the broad expanses of glass allowed for larger displays of merchandise to outside pedestrian traffic, creating the idea of the sidewalk showcase. Sullivan designed the unique corner entry to be seen from both State and Madison. The attractive ornamentation above the entrance gave the store an elegant and unique persona important to the building's competition with neighboring stores, including Marshall Field's. It was designated a Chicago Landmark and added to the National Register of Historic Places in 1970 and designated a National Historic Landmark in 1975.