The church of Our Lady of Assumption is located in Vialonga, in Vila Franca de Xira, and is considered classified heritage since 1993. The church has features from the 16th century, but mainly from the two following centuries, namely the carved woodwork of the high altar and of the two side altars. It is a single nave church, with 18th century tile panels depicting episodes of the life of the Virgin. In the sacristy, there are more 18th century tiles, canvases and a red marble lavabo from the 17th century.