Where was Love Letters of a Portuguese Nun filmed?

1977 film by Jesús Franco

Love Letters of a Portuguese Nun (1977) was filmed in Lisbon, Sintra, Cascais, Jerónimos Monastery, Sintra National Palace, Castle of the Moors and 1 more place, 7 places named in its Wikipedia article, in Portugal. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data