Haha yes it looks greatttt!!!
The Mona Lisa was stolen around 1911 and I believe it wasn't until 1913, the thief was caught. I'm positive the painting was missing for more than a couple months but if you try putting years into months, that would be 24 months.
One of the main differences between the renaissance mass and a renaissance motet is that the mass is always based on a specific text that is part of the liturgy of a given day. Motet is not connected to some specific text that is part of the liturgy but is also like the mass usually sacred.