The building at 1835 W Harrison Street in Chicago, Illinois, is the historic Cook County Hospital Administration Building. Completed in 1914, this eight-story Beaux-Arts structure was designed by architect Paul Gerhardt. It played a significant role in providing medical care to early immigrants and low-income residents, becoming renowned as a teaching hospital and the site of several medical breakthroughs, including the development of the first blood bank in the United States and the discovery of the cause of sickle-cell anemia. After its closure in 2002, the building underwent a $133 million rehabilitation and reopened in 2020 as a mixed-use development, featuring a 210-room hotel, retail spaces, and a museum.