The public observation deck at the top of the Tour Montparnasse, long considered one of the most debated additions to the Parisian skyline, is set to close on March 31, 2026, ahead of a major redevelopment of the tower and its surrounding complex. Completed in 1973, the 210-meter structure has remained the only skyscraper within central Paris for decades, frequently criticized for its scale and contrast with the historic cityscape. The closure of the Paris Montparnasse Observatory marks the beginning of a multi-year transformation aimed at modernizing the tower while rethinking its relationship with the surrounding Montparnasse district.
