Murano's glassmaking monopoly began in 1291 when Venice's Grand Council relocated every furnace to the island — officially to prevent fires, practically to guard trade secrets under penalty of death. For seven centuries, the lagoon served as both workshop and prison. Maestros who fled faced assassination. Those who stayed commanded European courts, their lattimo milk-glass and cristallo clear formulas unsurpassed until Bohemia cracked the code in the 1600s. By then, Murano had embedded itself in the luxury economy. Chandeliers lit Versailles. Beads bought African slaves. The fornaci never stopped burning. Today, roughly thirty active workshops remain, down from hundreds at the Republic's height. You enter working factories, not museums. The oldest furnaces — Barovier & Toso traces lineage to 1295, Seguso to 1397 — occupy Renaissance palazzi along Fondamenta dei Vetrai. Demonstrations follow techniques Pliny described: gather molten glass on a blowpipe, inflate, shape with wooden tools soaked in water to prevent charring. The maestro works fast. Soda-lime glass vitrifies at 1,400°C and stiffens within ninety seconds. One error collapses the form. Apprenticeships span a decade. Skill this refined cannot be faked, which is why counterfeit Murano glass floods Venice's souvenir shops while the island's fornaci struggle for successors. Modern Murano walks a narrow line. Tourism sustains the workshops — visitors who watch a vase pulled from the furnace often buy one — yet mass demonstrations dilute the craft's prestige. The Consorzio Promovetro Murano certifies authentic producers, but enforcement is weak. Still, a glass factory tour Venice offers remains the clearest window into a tradition older than the printing press. The magenta glow of molten silica, the snap of shears trimming excess glass, the controlled chaos of a maestro commanding his assistants in Venetian dialect — these elements persist unchanged. Murano adapted to survive. It remains, against odds, a living workshop.