WrestleMania is a professional wrestling pay-per-view event , produced annually in late March or early April by MISC@1 -LRB- WWE -RRB- -LRB- formerly known as the ORGANIZATION@1 -RRB- .

WrestleMania -LRB- chronologically known as WrestleMania I -RRB- was the first WrestleMania professional wrestling event produced by the ORGANIZATION@1 .
