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Authors
Abstract(s)
O túmulo de Fr. João Coelho, localizado na Igreja do Mosteiro de Leça do Balio, é um grande exemplar da escultura de estilo Manuelino, executada em pedra de Ançã, da autoria de Diogo Pires, o Moço. Apesar da elevada qualidade de execução deste túmulo, bem como da importância do Monumento Nacional em que este se insere, a literatura sobre o mesmo é escassa, sendo a peça mencionada apenas em algumas publicações. Da mesma forma, não foram encontrados quaisquer tipos de registo relacionados com anteriores intervenções de conservação e restauro sobre o túmulo de Fr. João Coelho. No entanto, o estado de conservação atual do objeto de estudo, essencialmente na arca tumular, revela a possibilidade de aplicação de um revestimento que, uma vez envelhecido, terá oxidado, causando um grande impacto na unidade estética do túmulo, uma vez que se destaca uma mancha amarelada. Assim, verificou-se ser de extrema relevância a realização do estudo do túmulo de Frei João Coelho, incluindo a sua contextualização histórica, bem como da sua envolvente; o estudo dos fenómenos de alteração; o estudo dos pigmentos presentes; bem como a caracterização do microbioma. As análises de FTIR permitiram concluir que o amarelecimento na arca tumular terá sido, provavelmente, causado pela aplicação de óleo de linhaça. A análise da policromia, através de SEM, comprovou a presença de vermelhão, tratando-se possivelmente de policromia original. O recurso a métodos de análise biológicos permitiram a caracterização do microbioma da superfície do túmulo. Ainda na arca tumular, chegou-se à conclusão de que a generalidade das patologias presentes se deve à elevada presença de humidade e argamassas incompatíveis sobre o arcossólio do túmulo. No que diz respeito à intervenção sobre o túmulo, esta incidiu, essencialmente, na remoção de depósitos superficiais, e na remoção do revestimento de proteção envelhecido. Após a realização de vários testes de limpeza, optou-se pela utilização de carbonato de amónio para a remoção do revestimento amarelecido, fazendo uma remoção controlada do mesmo, tendo sido, desta forma, possível a restituição da correta leitura do túmulo de Fr. João Coelho.
The tomb of Fr. João Coelho, located in the church of the Monastery of Leça do Balio, is a great example of the Manueline style sculpture, executed in Ançã limestone, by Diogo Pires, o Moço. Despite the high quality of execution of this tomb, as well as the importance of the national monument in which it is located, the literature on the same is very scarce, being only mentioned in some publication. Likewise, no information was found related to previous conservation and restoration interventions on the tomb of Fr. João Coelho. However, the state of conservation in which the object of study was found, essentially in the tomb ark, reveals the possibility of a previous application of a coating which, once aged, will have caused its yellowing, provoking a great impact on the aesthetic unity of the tomb. Thus, it was found to be extremely relevant to carry out the study of the tomb of Fr. João Coelho, including its historical contextualization, as well as its surroundings; the study of alteration phenomena; the study of the pigments present; as well as the characterization of the surface microbiome. The FTIR analysis allowed us to conclude that the yellowing in the tomb ark was probably caused by the application of linseed oil. The study of polychromy, through SEM, proved the presence of vermilion, possibly being the original polychromy. The use of biological analysis methods allowed the characterization of the tomb surface microbiome. Still in the tomb, it was concluded that most of the pathologies present were due to the presence of high values of moisture and incompatible mortars above the tomb's arch. Regarding the intervention on the tomb, this focused essentially on the removal of surface deposits, and the removal of the aged coating. After carrying out several cleaning tests, it was decided to use ammonium carbonate to remove the yellowing coating, allowing a controlled removal of it, thus making it possible to restore the correct reading of the tomb of Fr. João Coelho.
The tomb of Fr. João Coelho, located in the church of the Monastery of Leça do Balio, is a great example of the Manueline style sculpture, executed in Ançã limestone, by Diogo Pires, o Moço. Despite the high quality of execution of this tomb, as well as the importance of the national monument in which it is located, the literature on the same is very scarce, being only mentioned in some publication. Likewise, no information was found related to previous conservation and restoration interventions on the tomb of Fr. João Coelho. However, the state of conservation in which the object of study was found, essentially in the tomb ark, reveals the possibility of a previous application of a coating which, once aged, will have caused its yellowing, provoking a great impact on the aesthetic unity of the tomb. Thus, it was found to be extremely relevant to carry out the study of the tomb of Fr. João Coelho, including its historical contextualization, as well as its surroundings; the study of alteration phenomena; the study of the pigments present; as well as the characterization of the surface microbiome. The FTIR analysis allowed us to conclude that the yellowing in the tomb ark was probably caused by the application of linseed oil. The study of polychromy, through SEM, proved the presence of vermilion, possibly being the original polychromy. The use of biological analysis methods allowed the characterization of the tomb surface microbiome. Still in the tomb, it was concluded that most of the pathologies present were due to the presence of high values of moisture and incompatible mortars above the tomb's arch. Regarding the intervention on the tomb, this focused essentially on the removal of surface deposits, and the removal of the aged coating. After carrying out several cleaning tests, it was decided to use ammonium carbonate to remove the yellowing coating, allowing a controlled removal of it, thus making it possible to restore the correct reading of the tomb of Fr. João Coelho.
Description
Keywords
Mosteiro de Leça do Balio Túmulo de Frei João Coelho Pedra de Ançã Manuelino Conservação Monastery of Leça do Balio Fr. João Coelho’s tomb Ançã limestone Manueline style Conservation