Entail foundation deed by Maria Fernandes da Póvoa, fulfiling the will expressed by her late husband, António de Madureira, fidalgo da casa do rei. Maria entailed properties in Porto, in the outskirts of the city and in other areas of the Entre Douro e Minho region. The estates were entailed and united "in an imaginary body" that could not be dismembered. The first administrator would be her first-born son, Diogo de Madureira, who would immediately take possession of the entail. Diogo and his successors were to ensure the celebration of perpetual masses in any church or monastery in Porto or in the locality where the administrator happened to live. The successors would be the first-born sons, excluding illegitimate children and clerics. If there was no legitimate descendant, the administrator could appoint a successor whose name was Madureira.