The most important Catholic place of worship in the city of Lisbon is the Cathedral known as Sé Patriarcal or simply Sé. The church is a wonderful fusion of French and Gothic Romanesque styles; its massive bell towers rise high in the Lisbon sky while the simple and austere interior preserves the tombs of kings and benefactors of the city. - https://www.lisbona.info/cosa-vedere-lisbona/alfama/
Throughout its history, the cathedral has been rebuilt on several occasions and, although it has survived in perfect condition, it has suffered the damage of various natural disasters . The great earthquake of 1755 destroyed parts of the church.
Cloister and ruins
The Cloister of the Self of Lisbon has a style similar to that of the Jerónimos Monastery, although its size is smaller. Inside the cloister you can see Roman, Arab and medieval remains, discovered in recent years.
To enter the cloister you need to buy a ticket, which costs very little and is completely recommendable .
At the top of the cathedral you can visit the treasure and see robes, jewels and relics from different eras.
Cloister: from 10:00 to 18:00 (Sunday from 14:00).
From May to September it closes one hour later.
Treasure : from 10:00 to 17:00. Closes on Sundays and holidays.