Once this project was completed, the monastery contracted (on 28 Setembro 1779) José da Fonseca Ribeiro to make the chancel. Pascoal José Parente moved to the monastery in 1786 in order to complete several paintings, including specifically the ""Sagrada Família"" ("Sacred Family"). By the time of the French invasion of Portugal in 1810, the Chapel of Nossa Senhora da Cabeça was not yet completed. In 1834, under the anti-clerical reforms of the Liberal government, the convent was closed. A formal inventory of the possessions and properties owned by the monastery began on 14 June 1834, with the buildings and site sold to a businessman in Visue: António da Silva. On 13 November 1835, in an ordinance, signed by Minister Silva Carvalho, the bell and clock were given to the Santa Casa da Misericórdia of Mangualde. Two years later, in 1837, the redoubt was incorporated into the municipality of Mangualde. The documents from the extinct convent, deposited in the seminary in Viseu were destroyed after a fire. On 31 July 1845, the "Irmandade das Almas" ("Brotherhood of Souls") in Mangualde, purchase two lateral altarpieces and a painting of the ""Fuga para o Egipto"" ("Flight into Egypt") for 48$000 réis. After the mismanagement of various property-owners and the Rosada family from Tibaldinho, which almost left it in ruins, the monastery was bought by António Jorge Ferreira, on 22 Abril 1965, for 728.720$00 réis. During a municipal council session, on 15 May 1978, a proposal to classify various properties in Mangualde, including the monastery, was debated. A petition was sent to the Director General of Cultural Patrimony () on 16 May, requesting that the monastery be classified as a "property of public interest" (). Throughout the 20th century several minor projects were completed to stabilize the previous damage: a new door was completed for the church; a cement staircase was added to the principal facade; a partial repair, in cement, of the right, lateral facade was completed; and the opening of new access-ways were undertaken. Yet, it would not be until the 10 August 1998, before the Ministry of Culture () re-classified the building as a "National Monument" ().