Venetian glass

A section from a larger view of Venice with the island of Murano in the distance (circa 1600 attributed to Danckerts in the style of the famous woodcut print by Jacopo de’Barbari circa 1500).
"Venetian glass is thought to have been made for over 1,500 years, and production has been concentrated on the Venetian island of Murano since the 13th century. Today Murano is known for its art glass, but it has a long history of innovations in glassmaking in addition to its artistic fame—and was Europe's first major glassmaking center. During the 15th century, Murano glassmakers created cristallo—which was almost transparent and considered the finest glass in the world. Murano glassmakers also developed a white-colored glass (milk glass called lattimo) that looked like porcelain. They later became Europe's finest makers of mirrors. Originally, Venice was controlled by the Byzantine Empire, but it eventually became an independent city state. ... Although Venetian glassmaking in factories existed as far back as the 8th Century, it became concentrated in Murano by law, beginning in 1291. ..."
Wikipedia
The History of Glassmaking in Murano
Discovering the Secrets of Venetian Glass (Video)
YouTube: Blowing Glass on Murano Island in Venice, Italy, Venice Murano glass blower makes a Horse figurine in a matter of seconds, Murano Glass Blowing of a Flower Vase with 2 handles, Vetreria Badioli Murano Venezia