梵蒂冈博物馆官方网站

First of all on the official ticketing website you will be prompted to choose the date of your visit and the area you wish to explore (Vatican Museums, Vatican Gardens, Archaeological Areas, Castel Gandolfo Residence, Santa Maria Maggiore), along with the number of visitors and the type of your group (singles, groups, families, etc.), even though this last information is optional. Then you can click on "Search".

After clicking on "Search", you will be presented with a list of available tickets or tours for the date and the attraction you selected. In this page you can flag "Show only bookable visits" on the top right to filter out everything that's already sold out, and if the experience that you were looking for is not available, you can easily change the date from the scroll bar at the top of the page. When you find the combination of tickets and date that suits your needs the best, you can click on "Book".

Now a new menu will open where you can select the number of tickets you wish to buy (normal or reduced) and the time of your visit. As soon as you select a time slot, you will be able to add several add-ons to your visit, like the audio-guide, lunch or happy-hour menus and a few other. When you're done with the add-ons, you can click on "Proceed" and you will be asked to write all the necessary data for your group. Then you will be able to pay with credit card (Visa and MasterCard are both valid).