Why Were Masks So Popular in Medieval Venice?

I'm in Venice now and this is such a perfect opportunity to talk about the absolutely mind blowing tradition of Venetian masks! Why were they used? Why was Venice called "the masked city?"

Masks have always been an important feature of the Venetian carnival. Traditionally people were allowed to wear them between the festival of Santo Stefano (St. Stephen's Day, December 26) and the end of the carnival season at midnight of Shrove Tuesday (movable, but during February or early March). As masks were also allowed on Ascension and from October 5 to Christmas, people could spend a large portion of the year in disguise.

Maskmakers (mascherari) enjoyed a special position in society, with their own laws and their own guild, with their own statute dated 10 April 1436. Mascherari belonged to the fringe of painters and were helped in their task by sign-painters who drew faces onto plaster in a range of different shapes and paying extreme.

Venetian masks can be made of leather, porcelain or using the original glass technique. The original masks were rather simple in design, decoration, and often had a symbolic and practical function. Nowadays, most Italian masks are made with the application of gesso and gold leaf and are hand-painted using natural feathers and gems to decorate.[citation needed] However, this makes them rather expensive when compared to the widespread, low-quality masks produced mainly by American factories. This competition accelerates the decline of this historical craftsmanship peculiar to the city of Venice.