The focal point of the plaza, Spreckels Temple of Music, also called the "Bandshell", was a gift to the city from sugar magnate Claus Spreckels. The structure was built in 1899, in advance of the Music Concourse's completion in 1900. It was severely damaged in the 1906 and 1989 earthquakes, has repeatedly undergone extensive renovation, and has served as a stage for numerous performers over the years ranging from Luciano Pavarotti to the Grateful Dead. It has for decades been the venue for annual celebrations of the anniversary of the Polish Constitution of May 3, 1791.