Two houses, ten minutes apart, holding entirely opposite opinions about how much a room should contain.
Not a Monday. And not between two and four, whatever the internet tells you.
Sorolla first, and early. The garden is the entrance and it sets the temperature of everything that follows; arrive with a queue behind you and you will walk through it instead of standing in it.
Cerralbo asks for the opposite frame of mind. It is a house with no restraint whatsoever, and the trick is to stop trying to see everything and pick one cabinet — the glass, in my case — and give it ten honest minutes.
The two are a short taxi apart and a long, pleasant walk apart. The great galleries are elsewhere in the city and will happily eat the rest of the week; keep this one day for the houses and do not let the Prado bully it.