You'll probably see Cathedral of Amparo across town before you actually find this grand religious building. Peek inside if it's open or just appreciate the facade from outside.
When it comes to things to see and do in Centro, Cathedral of Amparo is rated by fellow travelers. And in great news for your budget, admission is free. Cristo Redentor and Museu Bernardino de Campos Amparo are also worth seeing and are within easy reach of the principal church.