The area known as Murano encompasses a series of small islands located in the Venetian Lagoon, in the north of Italy. Over time, these islands became linked through a series of bridges. Murano is located about one mile north of Venice and was initially a separate community, although it came under the control of the main Venetian government in the 13th century. Present-day Murano is one of the administrative units that comprise the municipality of Venice and has a population of about 7,000 people; it is still only accessible by boat, most commonly a ferry or water bus. For centuries, Murano has been known as an important center for glassmaking. Evidence of glassmaking dates to the ancient world, with some glass artifacts having been created as early as 2000 BCE. Techniques for glass production differed across various regions and cultures. Glass production was initially distributed across Venice and the surrounding islands, but in 1291, all glassmakers were required to move to Murano. Because traditional glassmaking involves open flames, artisans working in this area were considered a fire risk and were required to move away from the central urban area, as wooden buildings were located nearby and could easily fall prey to massive fires.