Okay kiddo, so an artesonado is a special type of ceiling that you can see in some really fancy buildings, like palaces or important churches. It's made up of lots of pieces of wood that fit together like a puzzle to make a really cool pattern.
Usually, these pieces of wood are carved or decorated in some way to make them look extra special. Sometimes they're painted too, with really bright colors like red or gold.
So when you look up at an artesonado ceiling, it's like looking at a big, beautiful puzzle made out of fancy wood pieces. It makes the room look really grand and important!