The Cathedral of Oporto is located in the district of Batalha near the old city walls. Construction began in 1110 and was completed in the 13th c. The Se is one of the most important monuments in Portugal. It is of Romanesque design with some Gothic and Baroque additions.
The facade has a Baroque porch and the rose window is Romanesque.
In 1387, King John I married English Princess Philippa of Lancaster in the Cathedral. Their third son, Prince Henry the Navigator was baptized there in 1394.
There is a huge, ornate main altar. The vaulted interior is very tall and imposing.
The Gothic cloister is large and serene. The walls are covered with blue Portuguese tiles (Azulejos). The entire Cloister area of gardens, tiles, and arched, vaulted ceilings is stunning.
There is a treasure room which contains priceless sacred art and jewelry.
From the top of the Clerigo Tower, built in 1735, you will get the best views of the city of Oporto.
I spent at least two hours there wandering around and I could have stayed longer.
The Se is an important historical attraction in Oporto. I wouldn't miss it.