The Piazza is the public square in an Italian city. A piazza is where you will find a street cafe or a small vegetable market. Place a strip mall on all sides of the street, plus statues, fountains and ornamentation, and you will have a piazza.
In Piazza, the players are building up the piazza walls and ornamentation that will make this place somewhere that people will talk about for centuries to come.
The cards used in Piazza represents the workers that are supplying their resource. Various projects require a certain group of resources, others have a whole different set.
The players play as designers of this magnificent location, trying to create another masterpiece with their choices of resources. The first player to finish building all their walls will win the game.
—description from the designer