Lexington Hotel was a ten-story hotel in Chicago at 2135 S. Michigan Avenue that was built in 1892 ( or 1891 ) for attendees of the Columbian Exposition . The hotel is notable for being Al Capone 's primary residence from July 1928 until his arrest in 1931 . After the Saint Valentine 's Day Massacre , some commenters called the hotel " Capone 's Castle . " It was later renamed " The New Michigan Hotel " and functioned as a brothel with 400 rooms . The hotel closed in 1980 . On April 21 , 1986 locked vaults found in the hotel were subject to a live television program called '' The Mystery of Al Capone 's Vaults '' , which received 30 million viewers . The building was demolished in 1995 , in spite of the building being landmarked . The location where the hotel once stood is currently the site of a 296 unit residential high rise called " The Lex " that was completed in 2012
Saint Valentine 's Day Massacre
Saint Valentine's Day Massacre
Lexington Hotel