giotto's bell tower

hi all! anyone have any information on giotto's bell tower in the main square of florence? like maybe an official website that has such info as hours...price to climb the tower...opportunity to purchase advance tickets...experience there...thanks!

I'm not going to be in Florence until September but I found the official website for the Duomo which gives the hours and prices for the various monuments under Tourist Visits.

Here it is:

http://www.duomofirenze.it/index-eng.htm

Have a great trip!

cindy