Topkapi Palace's official website offers useful visitor information, like the opening times, how to get to the palace, a way to purchase the Istanbul Museumpass, rules and regulations, as well as information about the history of the place.
Tickets can be purchased on-site or online, through trusted third-party vendors. The official website also sells the Istanbul Museumpass e-card, which is a city card that includes several sites and museums through Istanbul.
There are several tour options to visit Topkapi Palace, including audioguides and guided tours, which may also include other attractions in convenient combo packages.
Photography is forbidden inside the museum halls.