Wikipedia
Sposalizio is the title of the first piece in Franz Liszt's Deuxième Année de Pèlerinage: Italie (Second year of Pilgrimage: Italy), published in 1858. The composition starts out with a simple pentatonic melody, which transforms itself into a complex musical architecture. The melody then transforms itself into a type of wedding march, which continually embellishes itself to lead up to the grand climax, which contains crashing octaves into a loud finish. The composition ends quietly.
Franz Liszt composed Sposalizio, which translates into " Marriage", from Italian, after being inspired from Raphael's painting The Marriage of the Virgin. This was quite common for much of the works contained in his Années de Pèlerinage.
Although the fast octaves can be somewhat challenging, the piece departs from the virtuosic fireworks that were trademarks of some of his earlier works.