The Historic Preservation Board meets tonight at 6:30 in City Council Chambers.  If you’ve ever wondered what they do, you should attend tonight’s meeting or listen to the audio of it through the city’s website.  Tonight’s business is a good sampling of the kind of cases they consider.  They are being asked to provides Certificates of Appropropriateness for proposed changes to several properties, including 1422 Washington Avenue, 1200 Illinois Street, 412 21st Street, 1715 Ford Street, and 1110 10th Street.