Where was the first WrestleMania held?

The first WrestleMania was held in Madison Square Garden in New York City; the 10th and 20th editions were also held there.

WrestleMania is a professional wrestling event produced annually between mid-March to mid-April by WWE, an American professional wrestling promotion based in Stamford, Connecticut. WWE first produced the event in 1985 and has since produced 35 editions, with the most recent having been held in East Rutherford, New Jersey on April 7, 2019.

WrestleMania, WWE's flagship event, airs on pay-per-view (PPV) and the WWE Network and is the most successful and longest-running professional wrestling event in history. It contributes to the worldwide commercial success of WWE through media, merchandise, and shows. WrestleMania was conceptualized by WWE owner Vince McMahon and long-time WWE ring announcer and Hall of Famer Howard Finkel is credited with devising the name "WrestleMania" in 1984.