The ruins of the Roman town of Pol·lentia lie just outside Alcúdia's walls. Founded around 70 BC, it was Rome's principal city in Mallorca and is the most important archaeological site on the island. Pol·lentia reached its apogee in the 1st and 2nd centuries AD and covered up to 20 hectares – its sheer geographical spread (most of it unexcavated) suggest it was a city of some size and substance.
In the northwest corner of the site is the Portella residential area – the most interesting of the houses is the Casa dels Dos Tresors (House of the Two Treasures), a typical Roman house centred on an atrium and which stood from the 1st to the 5th centuries AD. A short stroll away are the remnants of the Forum , which boasted three temples and rows of tabernae (shops). Finally, you walk another few hundred metres to reach the small but evocative 1st-century-AD Teatre Romà (Roman Theatre), which seems to be returning into the rock from which it was hewn. The theatre alone is worth the entrance fee.