period that followed appears to have been one of great prosperity for Catania, as well as for the Sicilian cities in general. In 415 BC, Catania became involved with the expedition to Sicily pursued by the Athenians to punish Syracuse. Initially the Catanaeans refused to allow the Athenians into their city, but after the latter had forced an entrance, the Athenian leader Alcibiades made a famous speech in front of the assembly. Catania became an ally, and the headquarters of the Athenian army for the first year of the expedition, and a base of their subsequent operations against Syracuse. After the defeat of the Athenians, Catania was again threatened by Syracuse. In 403 BC, Dionysius I of Syracuse plundered the city, sold its citizens as slaves, and repopulated the town with Campanian mercenaries. However, the Carthaginians would take possession of Catania under Himilco and Mago, after the nearby great naval Battle of Catana (397 BC) where they defeated Leptines of Syracuse, and in 396 BC forcing the local Campanian mercenaries to relocate to Aetna. Calippus, the assassin of Dion of Syracuse, held Catania for a time (Plut. Dion. 58); and when Timoleon landed in Sicily in 344 BC Catania was subject to the despot Mamercus who at first joined the Corinthian leader, but afterwards abandoned this allegiance for that of the Carthaginians. As a consequence he was attacked and expelled by Timoleon in 338 BC. Catania was now restored to a fragile independence; changing sides during the wars starting in 311 BC of Agathocles of Syracuse with the Carthaginians. When Pyrrhus landed in Sicily in 278 BC, Catania was the first to open its gates to him, and welcomed him with great splendor. Roman rule During the First Punic War, Catania was one of the first cities of Sicily to submit to the Roman Republic after their first successes in 263 BC when it was taken by Valerius Messalla. A sundial was part of the booty which was placed in the Comitium in Rome. Since then the city became a civitas decumana i.e. was subject to the payment of a tenth of its agricultural income as a tax to Rome. The conqueror of Syracuse, Marcus Claudius Marcellus, built a gymnasium here. It appears to have continued afterwards to maintain its friendly relations with Rome and though it did not enjoy the advantages of a confederate city (foederata civitas), like its