Visit Manhattan's 103-year-old Municipal Building for a special exhibit of historic maps and photos in the offices of Manhattan Borough President Mark Levine.

NYC Borough Presidents are responsible for maintaining the official maps of their borough. During OHNY Weekend, the Manhattan Borough President's Topographical Bureau will display a historically-essential map in the development of Manhattan executed by John Randel in 1820. This map is the first that plotted the 1811 "Commissioner's Plan" which established the Manhattan street grid from Houston Street to 155th Street.

Use the north entrance of the building located on Centre Street. Visitors will have to pass through a security screening with metal detector to enter the building. Masks are required.