Unless you're a staunch Catholic nutter, STAY AWAY from Seville during EASTER. We visited here about 8 years ago and were horrified that on each night, we couldn't get back to our hotel room. That's because huge crowds of (often drunk) 'pilgrims' were blocking the narrow streets with their silly marches and rituals. They usually carried large ugly pasos, kind of like parade floats, depicting some type of biblical event. Authorities had road blocks erected all over the place from about 6 pm until around 11 pm - 12 midnight. And if you get claustrophobic, this IS NOT FOR YOU!!! We had a much more enjoyable time in Granada, Barcelona and a beautiful little town called Ronda.
Drunk pilgrims? In the parades? Where have you seen those? You must be joking. They come out of a church with very strict rules that they must follow during the whole parade. Ugly pasos? They are master pieces, some dating back to the 16th c. The parades, as you see them today, date back to that century as well. Yes, better to stay away from Seville if an anthropological manifestation that has been going on each Easter for more than 500 years is not for you. There are many more weeks to go there when you will only be bothered by other tourists. Stay away from the locals and what you call their "silly rituals". 🙈🙉