Image by Cornell University Library via Flickr

This is a website that we use and recommend to friends. It's great for booking at many attractions in Italian cities such as Florence, Rome and Venice. You can reserve tickets for amongst others:

In Florence: Florence Art Tours, Florence Walking Tours, The Uffizi, The Academy & David, Uffizi Guided Tours.
In Milan; Brera Gallery, Last Supper Tickets, Last Supper+Milan Tour.
In Rome: Borghese Gallery, Colosseum, Vatican Tours.
In Venice: Murano Glass Palazzo Ducale, The Academy, Venice Clock Tower.
In Verona: The Opera Festival.

Casa Dolcetto: The Blog recommends tickitaly.com who are online licensed advance reservation agents for tickets to Italian state museums, attractions and events.