This museum includes the Gold Chapel as well as a mix of artifacts. The admission cost is very reasonable. It includes a small amount of fine art, fossils, religious relics silver and more. It gives a taste of the culture and history and can be done in a short visit if you are pressed for time.

Fun little museum with an eclectic mixture of exhibits from Neolithic finds to an exhibition of modern photography
We enjoyed the models of local fishing vessels and techniques although this is probably not of interest to all.
The attached baroque church is fine of its kind and certainly excels in displays of gold leaf .
The exhibits are labelled in Portuguese and English but I am not sure the translations have been checked via native English speaker which is rather charming.

The Doctor certainly had a wide range of interests. It's a random collection and it's at times hard to follow, with little guidance on what you're looking at, but essentially there is no linking theme, so just take each room/ collection on its own merits.
The attached church is garish and whilst I appreciate its age etc, it's very OTT and an example of the Church showing off its superiority to its poor congregation. The depictions and commentary on the life and works of St Anthony around the church walls are also dumbfounding and he certainly seemed a difficult Saint to admire!