Tickets for the Colosseum can be purchased in several ways:
1. Online: via authorised partners such as Get Your Guide, Tiqets, Viator
2. Physical points of sale: There are also authorised points of sale near the Colosseum where you can buy tickets.
3. Guided tours: Many tour operators offer packages that include the entrance ticket to the Colosseum together with a guided tour. This can be an interesting option if you want to go deeper into your visit.
4. Travel apps: Some travel apps and online platforms offer the possibility to buy tickets for the Colosseum.
It is advisable to buy tickets in advance, especially during the peak tourist season, to avoid long waits.