Another interesting exhibit at the castle was the Camera Obscura. Wikipedia defines it this way: A camera obscura is a darkened room with a small hole or lens at one side through which an image is projected onto a wall or table opposite the hole. The image of lensless camera obscuras is also referred to as "pinhole image.”
We happened upon it by accident, and it was on our list to see at the castle. We thought we were in line for the English tour, but it turned out to be in Portuguese. (I’m sure we can find the content on YouTube.) It was still fun to experience the view.
Lots and lots of stairs up!
Next, we visited the Lisbon Cathedral which is in the shape of a Latin cross with three aisles, a transept, and a main chapel. Around the edge is an ambulatory, a processional around the main chapel. With its two towers, the church looks like a fortress. This is also seen in other Portuguese cathedrals of this time when the cathedral may have been used as a base to attack the enemy during a siege.
Surrounding the sanctuary were small chapels:
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