No, the Colosseum is not in Greece. It is located in Rome, Italy. The Colosseum, also known as the Flavian Amphitheatre, is one of the most famous landmarks in the world and a symbol of ancient Roman engineering and architecture.
Built between 70-80 AD, the Colosseum was used for gladiatorial contests, public spectacles, and other events. It could hold up to 80,000 spectators and is considered one of the greatest works of Roman architecture and engineering.
Greece, on the other hand, is home to many ancient structures like the Parthenon in Athens, but the Colosseum is distinctly Roman and remains a major tourist attraction in Italy.