Entail foundation deed by Cristóvão de Brito, member of the king's council. Cristóvão justifies the institution of the "morgado" as a way to prevent the scattering of the estates and to preserve his memory, allowing for better service to God and the kingdom and greater honour to the noble houses. The instituor decided to entail interest in the "alfândega" of Lisbon, his houses in Lisbon, located in the parish of S. Lourenço, and a farmstead in Ribatejo, leaving instructions for the acquisition of other properties to be included in the entail. The income from the properties would also support two daily and perpetual masses to be celebrated in the chapel of Nossa Senhora da Assunção, to be located in the church of the convent of Madre de Deus de Lisboa, which was under construction, and for which he had already purchased liturgical furnishings, such as a retable of "Nossa Senhora". The first administrator would be his nephew João de Brito, son of Lopo de Brito. An inventory of the assets was to be drawn up, with three copies: one for the administrator and the other two to be kept at the S. Elói Monastery in Lisbon and at the Hospital of Todos-os-Santos. His successors were also obliged to entail more property. The succession would pass through the first-born sons, excluding illegitimate children and clerics. The presumptive heir was not allowed to marry without the consent of his parents, under the penalty of being removed from the succession. In addition, each administrator had to be physically and mentally fit, to be loyal to the Church and to the Crown, and to use the name and the coat of arms of the Britos.