Venice in pre-Roman times [Venice did not exist in pre-Roman times: it was founded in 420 A.D.] represented, in the Upper Adriatic area, the culmination of all the maritime trade with the eastern shores of the Mediterranean. Of all the goods arrived from the East, glass enjoyed a representative role. As evidence of this through excavations carried out for the remediation of historic buildings [where?], Have been found in it housing facilities from the Roman era, so officially it was thought that the city of Venice had been incurred by deserters of the Roman city to find refuge from the barbarians.
From this we can deduce that the glass Venetian art comes directly from Roman and Northern Adriatic, however, the real development occurred in the Middle Ages, where art and craft were further enhanced  . The Venetian glassmakers began to practice this art inheriting the use of glass by sodium Eastern. Such a composition is suitable for hot work and in this cleverly distinguished for the aesthetic taste and the use of more colors. The aesthetic capacity for Venetian is based on the intuition that the glass is a highly malleable material and thus suitable for being blown and shaped in incandescent state, but able to maintain the same color characteristics even in the finished product. This differs from the Nordic tradition, which holds that the glass is the equivalent of the hard stone and then that the skill lies in valuing the objects through the cut. The first documents that come to us on the art Venetian glassmaking dates back to 982 AD, the year in which it appears the name of a craftsman glassmaker in Venice, so we can assume that this art, which is still active, is more than a thousand worldwide . After 982 there was confirmation of the existence of other Venetian glass, but in the thirteenth century the dominance turned sharply of Murano artisans. This was due to the fact that the glassworks focused course on the island of Murano, so much so that in 1291 the state established the destruction of glassware made in Murano in Venice deputandone the historical origin, so much so that these days some dynasties today glassworks have produced their activities without interruption.
It is believed that the glass factory in Murano originated in the eighth century , with significant Asian and Arabic influences, as Venice was a major trading port. The fame of Murano like glass processing center was born when the Venetian Republic, to prevent the burning of the buildings of the city (then largely built of wood), ordered glassmakers to move their foundries to Murano in 1291 and the first sprang up in the popular rio of Glaziers. 
Unlike other countries where the glassworks stood in production sites of raw materials or fuel, Venice and Murano have always imported all materials such as silicon glazing, the dark sodas and other, from far away places, including firewood, fuel up the last century, which came from Istrian and Dalmatian coasts. The true quality of the island of Murano, though, was the man with his experience, which over time has perfected the styles, quality and the ability to shape the hot glass. These glass artists have always been contacted since the Renaissance to bring in the courts and in the shops of their skills, becoming masters. In fact, for this reason, in Murano glass he was activated a school that initiated young people to this profession even if the experience in glassworks remained unique. In the Middle Ages and the Renaissance, the Murano glass was required by the upper classes of Europe, starting from the invention of glass in 1450; In fact, the crystal is a glass quality that differs and that gives the same glass of the peculiar characteristics due to the same base of silicon but in a higher percentage of lead oxide (24%), for which the products created were particularly refined to meet the demand for extremely wealthy clients. In the Baroque period the research was transformed through the execution of effect objects such as roes, or compositions containing silicates, tin and lead with white appearance milk from which the etymology, which approached perfectly to the furniture of the eighteenth century Venice also in ‘decadent era of the Venetian Republic. After the end of the Republic of San Marco in 1797 the glass handicraft revival happened in the second half of the nineteenth century, and the glassworks that were born still worked out techniques in use and which gave rise to the contemporary glass and design.
The glassmakers of Murano class soon became the most prominent on the island: in fact, from the fourteenth century, glassmakers were allowed to wear swords, enjoyed immunity from prosecution by the Venetian state and their daughters were allowed to marry with the most wealthy families of Venice. However glassmakers were never allowed to leave the Republic. Many craftsmen took the risk to plant the processing furnaces in nearby cities or in distant countries like England and the Netherlands. At the end of the sixteenth century, three thousand seven thousand inhabitants on the island of Murano were involved in some way in the glass industry. For several centuries, the glassmakers of Murano maintained a monopoly on the quality of the glass, on the development or improvement of techniques, including those of crystalline glass, enameled glass, glass with threads of gold (aventurine), the multicolored glass (millefiori ), the glass-milk (milk glass) and precious stones in glass imitated. Today, the artisans of Murano are still employing these century-old techniques, in every processing: from contemporary art glass to glass figurines Murano, to the chandeliers and wine stoppers. Today, Murano is home to a vast number of factories and workshops-studies of individual artists who create all sorts of glassware both for mass market for both original sculptures.