Saint Mark's Basilica is on the Piazza San Marco and is one of the highlights of a visit to Venice. As with most churches in Italy, you must be dressed appropriately to be allowed in; this means no short skirts or bare shoulders. You are not allowed to carry large bags or rucksacks inside, sometimes even small daypacks may need to be deposited. Storage is available just around the corner from the main entrance (free of charge). Filming and photography is forbidden so be prepared in advance. The visit within the basilica lasts ten minutes. Waiting for entry into the basilica can last up to five or so hours and it may be wise to use a ticket service to reserve your visit (reservation costs €2, official tickets at venetoinside.com). Once you have a reservation you can take the group entrance on the left, where you hand in the printout of your reservation.