Mayor-elect Brandon Johnson, all 50 aldermen and the city clerk and treasurer will be sworn into office during an inauguration ceremony set for 10:30 a.m. May 15 at the Credit Union 1 Arena at 525 S. Racine Ave. The inauguration ceremony will be followed by a "City Hall Open House" beginning at 2 p.m. on the 5th floor of City Hall at 121 N. LaSalle St. Additional information on public tickets for the inauguration ceremony and information on the open house will be available May 8 at www.chicagoforthepeople.org