Bohemian glass is a decorative glass made in Bohemia and Silesia from the 13th century. It was especially outstanding its manufacture in high Baroque style from 1685 to 1750. In the 17th century, Caspar Lehmann, gem cutter to Emperor Rudolf II in Prague, adapted to glass the technique of gem engraving with copper and bronze wheels. Glass can be made transparent and flat, or into other shapes and colors as shown in this sphere from the Verrerie of Brehat in Brittany. ... Flag of Bohemia Bohemia (Czech: ; German: ) is a historical region in central Europe, occupying the western and middle thirds of the Czech Republic. ... Silesia (Czech: ; German: ; Latin: ; Polish: ; Silesian: Åšlónsk) is a historical region in central Europe. ... (12th century - 13th century - 14th century - other centuries) As a means of recording the passage of time, the 13th century was that century which lasted from 1201 to 1300. ... Events February 6 - James Stuart, Duke of York becomes King James II of England and Ireland and King James VII of Scotland. ... Events March 2 - Small earthquake in London, England April 4 - Small earthquake in Warrington, England August 23 - Small earthquake in Spalding, England September 30 - Small earthquake in Northampton, England November 16 – Westminster Bridge officially opened Jonas Hanway is the first Englishman to use an umbrella James Gray reveals her sex... (16th century - 17th century - 18th century - more centuries) As a means of recording the passage of time, the 17th century was that century which lasted from 1601-1700. ... Look up gem in Wiktionary, the free dictionary. ... Holy Roman Emperor Rudolf II Rudolf II Habsburg was an emperor of the Holy Roman Empire, king of Bohemia, and king of Hungary. ... Nickname: Motto: Praga Caput Rei publicae Location within the Czech Republic Coordinates: , Country Czech Republic Region Capital City of Prague Founded 9th century Government  - Mayor Pavel Bém Area  - City 496 km²  (191. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance metallic pinkish red Standard atomic weight 63. ... Assorted ancient Bronze castings found as part of a cache, probably intended for recycling. ...