Near Brushes With Royalty

After finishing my third cafe con leche of the day at an outside cafe, I started walking towards a museum. A door in the building on my left opened up and 3 musicians in red costumes stepped out in front of me wheeling some big drums. I wondered what I had just walked into. They were headed my way, so I followed them down the street and over the bridge where there was a large theater adjacent to the museum. I noticed quite a few police officers standing around and nicely dressed people queuing up at the entrance. I proceeded on to the museum and inquired about what was going on next door. Apparently the queen of Spain was there to hear the prime minister. I didn't actually lay eyes on the queen, but I came pretty close!