You may have sliced a few pizzas on Monday's Google Doodle, which features versions of the culinary favorite from all over the world. Google's interactive Doodle allows you to slice pizza using your cursor, with certain rules about the number of slices you get and the toppings that need to go on each slice. The pizzas represent cultures from all over the world, including Italy, Argentina, Canada, Hungary, Japan, Thailand, India and Brazil.

Why are we celebrating pizza on Dec. 6? On the same day in 2007, the culinary art of Neapolitan “Pizzaiuolo” was inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity. In other words, pizza became a cultural touchstone of the human race.