Diogo Lino Pimentel (1934–2019) was a Portuguese architect who graduated from the ESBAL in 1959. During his student years, he became affiliated with the Movimento de Renovação de Arte Religiosa (MRAR). In 1960, he initiated a period of study in Bologna at the Centro di Studio e Informazione per l’Architettura Sacra, an institution founded by Cardeal Lercaro and directed by Italian architects Giorgio Trebbi and Glauco Gresleri. The subject’s academic endeavours were facilitated by a scholarship from the Calouste Gulbenkian Foundation. Following his return to Portugal in 1961, he was invited to join the recently established Secretariado das Novas Igrejas do Patriarcado (SNIP), where he assumed the role of technical director until his retirement in 2014. In one of his inaugural projects in the religious field, the São Domingos Chapel, in Aldeia Nova, Ourém (1964–1967), which the architect was particularly fond of, there may be an Italian influence evident in the design, derived from the work he had followed during his internship, the Beata Vergine Immacolata Alla Certosa Church (1956–1961). On initial observation, the two works are characterised by the use of curved outlines delineating the perimeter walls. Despite the apparent simplicity of their form, these structures exude a sense of dynamism and expressivity through the intricate textures printed on the white-painted plaster. The objective of this article is to establish the relationship between Diogo Pimentel’s work and the influence of Italian sacred architecture.