Book in advance to climb leaning pisa

Got the chance to visit Pisa tower and was really excited. Counted down to the 21 days before ticket sales open and got tickets to climb up to the top of Pisa. Would think this is a once in the lifettime opportunity and i timed it well with sunset time. Was lucky to really see the sun that day. Here, you learn why the tower leans precisely to 5 degrees (something i learnt) and the numerous bells there are at the top. Of course, sharing photos of the near sunset pictures i caught from the top as well.