Located at the confluence of two rivers - the Tagus and the Zêzere - Constância has a characteristic physiognomy on account of the row of white houses harmoniously inset on a hillside.
It was its geographical position that formed the characteristics of this town, which in the 14th century was an important river port and a busy trading post.
The name of Constância is linked to that of Luís Vaz de Camões, the great 16th century poet and author of the Lusíadas, who lived here for some time. The "Pomonas Camonianas", festivals that portray the medieval age, are held on June 10th every year, when the town pays homage to its poet.
Another annual event that draws many people to Constância are the Festivals of Nossa Senhora da Boa Viagem (Our Lady of the Safe Journey), which take place at Easter, when the residents present themselves in all their splendour, with the streets adorned with coloured paper and enlivened by the many small bars and restaurants that are scattered around the town. The high point of this festival is on Easter Monday, when there is a procession of decorated boats.