Oh man, that's no good! A shame indeed and but it's good that you managed to visit it at a later time.
These things that happen are part of life, we can allow it to ruin our holidays and general plans or we can take them in our stride and pivot to other things that may provide better experiences.
Eventually the closed museum was rewarded. In the second visit we spent a week in the city, and we were able to get to know the place in a way that we would not have done in one day. The city is called Cuenca, and if you are passing through Spain and have a chance to visit it, you will not waste your time. If you go in autumn, all the better.
I'd like to visit Spain at some stage, not somewhere I've been before. I'll call ahead and make sure the museum is open though. 🫣
You will do very well, I know people who don't.😁