Chapel foundation deed by Álvaro do Porto de Pedroso, escudeiro fidalgo, and his wife Margarida Eanes. The document justifies the need to create entails as a way of avoiding partitions, favouring an heir who would preserve the memory of the founders and help his relatives. They decided to reserve their "terças", in which they incorporated the Barrosa manor, in the parish of Lanheses. They appointed their son Lourenço de Pedroso as the first administrator. The entail had the obligation of a weekly mass every Friday in the chapel of the mother church of Ponte de Lima, which had been built by Gonçalo do Porto, and of which the institutor was the administrator. They also imposed masses to be celebrated in the chapel of the Barrosa estate. Several obligations were imposed on the administrators: they had to acquire and entail lands in the vicinity of the Barrosa estate, and they had to use the surname of the founders, emphasising that this was the main reason for the foundation of the chapel, in memory of the people from whom they had received the estates.