Mataro (Latin: Iluro) is the capital and largest city of the comarca of the Maresme, in the province of Barcelona, Catalonia Autonomous Community, Spain. It is located on the Costa Maresme, to the south of Costa Brava. Mataro dates back to Roman times when it was a village known as "Iluro" or "Illuro." The ruins of a first century BC Roman bath house (known locally as the Torre Llauder) were recently discovered and can be visited. The coastal N-II highway follows the same path as the original Roman road.Mataro was declared a city by royal decree, even though at the time (nineteenth century) the population fell short of the requirement for city status.