One of the golden triangle of Madrid art museums, you need three to four hours for this one. The…read morebest order, if possible, is the Prado the first day (which takes all day) because one can learn so much from the very detailed descriptions there that will help frame the order the art here is arranged in. The collection spans from a couple of pieces from the 13th century to contemporary, with especially good collections of Spanish medieval, Dutch masters, French impressionist, expressionist, cubist, modernism, post abstract realism, and 20th century sculpture. Although we bought tickets for all three when we went to the Prado, we found ourselves in line before Noon on free day Monday. The line was daunting it was so long, but once they opened we were in within about 20 minutes. The crowd wasn't as stifling as in the Prado, but worse than the Sofia, but you just don't want to miss this amazing art musuem just because it's too popular. Lots of sick people cough and sneezing, I would mask up.