If you go to [poi = 696271] Coimbra, Portugal [/ poi] don't miss the Roman ruins of Conimbriga. They're only a 30 minute bus ride (for those ve want to or must use public transport) from Coimbra and leave regularly from the Coimbra station. Be careful though, as not all the buses arrive the ruins, some stop in Condeixa, a 10-15 minute walk from Conimbriga. Once you arrive at the ruins, it's easy to follow the layout of the streets and houses. The homes, with their atrium and peristyles and mosaics are extraordinary. There are also well-preserved remains of temples, baths, and an aqueduct. You can visit the [poi = 551411] Conimbriga Monographic Museum [/ poi] in Condeixa-A-Nova which is very interesting.
Alongside Camões Square and D. Antonio José de Almeida Garden is a square that's the rear access to the Municipal Cultural Center, where there are archaeological excavations under a series of metal catwalks. According to the signs they are fragments of an eighteenth century cathedral that were found in 2004 and are still being worked on. The temple was a Latin cross, with a long nave and transept, which had the main access on Praça Camões.