The Main Square is triangular and is surrounded by forty arches with keystones. Documentary evidence of the square dates back to 1275 and today it is the most important in Banyoles and has a market every Tuesday morning.
The buildings in the square are mediaeval houses with a ground floor, first floor and attic. Over the years, they have been renovated and many of them have had a third floor and roof terrace added.
The only building that still has only one floor constructed over the vault is Cal Moliner, which houses the Tourist Information Centre and the headquarters of Banyoles Town Council Economic Promotion Department and the Office of Commerce and Tourism.