Pierrot is a stock character of pantomime and commedia dell'arte whose origins are in the late seventeenth-century Italian troupe of players performing in Paris and known as the Comédie-Italienne; the name is a diminutive of Pierre (Peter), via the suffix -ot. 

The Moretta was a small mask covered with black velvet (hence the name 'Moretta' because, in Venetian dialect, 'moro' means dark, black) of French origin and reserved exclusively for women. Initially it was used by the ladies when they went to visit nuns in respectful silence: the Moretta, in fact, did not allow the wearer to speak because it was held close to the face without the use of laces, but by biting a button on the inside, positioned at the level of the mouth . 

The gondolier is a big part of Venetian culture.

You will see them all over Venice : in the summer dressed in the easily recognisable straw boater with jaunty ribbon and the stripy vest; in winter not quite so colourful as, along with most other Italian people, they cover up in fleeces at the first sign of a cool breeze. 

Venice Carnival
The Venice Carnival became extremely popular during the eighteenth century, when aristocrats from all over the world would attend the annual festival. The royal families and nobility of other neighbouring countries would also come and dress up with elaborate masks and costumes. 

After a long absence, the Carnival returned in 1979.
The Government decided to bring back the history and culture of Venice, and sought to use the traditional Carnival as the centerpiece of its efforts.
The redevelopment of the masks began as the pursuit of some Venetian college students for the tourist trade. 

The Plague Doctor in Venice: among the most bizarre Venetian Carnival masks, the Plague Doctor, the Italian Plague mask, is the most recognisable thanks to the long nose which resembles the beak of a stork.
One of the major plagues in Venice was definitely the black plague, that struck the city on several occasions.
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Piazza San Marco is the city's main public square and contains its most famous buildings such as St Mark's Basilica and the Doge's Palace. Napoleon called it 'the world's most beautiful drawing room'. Piazza San Marco is in the heart of Venice.
Piazza San Marco, often known in English as St Mark's Square, is the principal public square of Venice, Italy, where it is generally known just as la Piazza.