Entail foundation deed in which Frei Bartolomeu de Santo Agostinho and Miguel de Abreu, Ana de Abreu’s brothers, fulfiled her will by executing the deed in front of the provedor dos resíduos, including the necessary conditions and obligations. The entail was instituted by Ana de Abreu, who chose her brother Miguel de Abreu as the first owner. Frei Bartolomeu de Santo Agostinho and Miguel de Abreu stipulated that Miguel Abreu’s eldest son should succeed him or, if he did not have a son, his eldest daughter. They provided detailed alternatives for succession, where males should always precede females. If the direct line of descendants of Miguel de Abreu were to end, other lines of the family would be considered except for the offspring of D. Margarida, Isabel de Abreu’s daughter. Illegitimate succession could only be considered as a last resort and clerical succession could occur before passing the entail to a transversal line. Other conditions for succession are detailed, including the pious charges Ana de Abreu established and the obligation of successors to annex a third of their assets. The remaining amount of Ana Abreu’s assets was delivered to Miguel de Abreu, who was to invest it to enrich the entail. It inserts an extract from Ana de Abreu’s will.