While enamelled metal drinking-vessels date back to Antiquity, I am not sure how early the first pieces of enamelled glassware appeared. These pieces are almost always drinking-vessels -- though the shape and the decoration styles vary greatly. There are also several mosque lamps done in this style (these may be broken out into their own linkspage at some point in the near future).

The links are divided up by the region of origin (which work out to be roughly chronological clusters). Here are some more links on enamelling and glassworking. You can emulate this sort of decoration relatively easily if you'd like to paint your own feastware.

• The Luck of Edenhall, a 13th century beaker
• Footed bowl with an inscription, mid-13th century
• Beaker with leather case; the glass is from mid-13th century Syria, but the case was made in 14th-15th century Germany (also here, here, here, here, here, here, and here)
• Beaker with saints and monasteries (?), c. 1260
• Beaker with a figure riding a white donkey, c. 1260
• Beaker, c. 1250-1270
• Flask, c. 1260-1277
• Bottle with a phoenix, mounted warriors, and vegetal patterns, late 13th century
• Vase with birds
• Mosque lamp, mid-14th century (also here and here)

• The Luck of Edenhall, a 13th century beaker
• Mosque lamp, c. 1285
• Beaker with fish and eels, c. 1300-1320
• Mosque lamp, c. 1329-1335
• Glass lamp, mid-14th century
• Glass lamp, mid-14th century Egypt or Syria

• Glass beaker with harpies, attributed to Aldrevandini, second half of the 13th century
• Glass beaker with armorial decorations, attibuted to the workshop of Aldrevandini, c. 1260-1290
• A glass beaker with armorial decoration and an inscription, c. 1250-1320
• Beaker, c. 1260-1270
• Fragmentary beaker with Latin inscription (part of the "Ave Maria"), c. 1300
• Fragments of beakers with saints, a pelican, and shields, c. 1300; see also this photo and caption
• A so-called Syro-Frankish beaker with harpies, 14th century (also here, here, and here)
• The Aldrevrandini Beaker, with an inscription and three heraldic shields, c. 1330
• Glass goblet with armorial decoration, c. 1450-1500
• Beaker, 15th or 16th century
• Goblet with ladies and gentlemen and inscription, last quarter of the 15th century (also here, here, here, here, here, here, here, and here)
• Goblet with profile portraits of a man and a woman, c. 1475-1500 (V&A 409-1854)
• Betrothal goblet with profile portraits of a man and a woman, with cherubs and a scroll and motto, the end of the 15th century
• Two-colored goblet with gold and enamel decorations, c. 1475-1500
• Goblet with abstract floral decoration, c. 1475-1510 (V&A 7536-1861)
• The Petronell Welcome, with abstract geometric decoration, c. 1480
• Goblet with a pattern of interlaced tendrils, stylized palmettes, and daisies, late 15th century or early 16th century
• Ewer, c. 1500
• Beaker with "patera" decoration, early 16th century
• Pilgrim flask with two boys standing in a landscape and holding a shield, c. 1500-1520
• Glassware from 16th century Venice: goblet with enamel decoration on the edge (also here) and a pilgrim's flask with the heraldry of a German family

• Betrothal goblet with a man and lady and inscribed scrolls (and a goat), made in mid-16th century France
• Ewer with a man holding a banner, second half of the 16th century (also here and here)

Armorial Designs (Wappenglas, Wappenhumpen, etc.)

• Goblet with the arms of the Liechtenberg family, Bohemia, c. 1500-1530
• Various 16th century German glasses
• Goblet (Kelchglas) made in Italy or Bohemia, mid-16th century
• Tall beaker (Stangenglas) with the heraldry of Joachim von Ortenburg and Ursula von Fugger-Kirchberg, 1554
• Goblet with the heraldry of Michael Ludwig von Freiberg and his wife, made in Germany in 1566
• Glass with inscription and heraldry of Ludwig Hausner, made in Nuremburg (?) in 1582
• Beaker with the arms of the Schiltl family and the Portner von Theurern family, made in southern Germany in 1586
• Glass with a crest, Germany, c. 1586-1600
• Beaker (Stangenglas) with the arms of Puchner, made in Bohemia or Germany in 1587
• Glass (Stangenglas) with the heraldry of Christoph Kneringer, made in Germany in 1589
• Beaker (Stangenglas) with the arms of Hirt and Maier (with mottos), made in southern Bohemia or eastern Bavaria in 1590
• Glass (Wappenglas) with heraldry, 1591
• Stangenpokal made in southern Germany c. 1594-1600 (back, front detail, back detail)
• Glass with heraldry, made in southern Germany or Saxony, 1595 (also here)
• Beaker (Wappenhumpen) with heraldry, made in Germany c. 1595 (also here)
• Beaker (Wappenhumpen) with heraldry, made in Germany c. 1595 (also here)
• The Moritzburg Welcome, made in the Saxon-Bohemian Ore Mountains in 1602 (also here)
• Goblet with heraldry, made in southern Germany in the early 17th century (also here)
• Glass (Hofkellereiglas) with the same heraldry on each side, 1610
• Glass (Hofkellereiglas) with different heraldry on each side, made in Saxony in 1611/li>
• Glass (Hofkellereiglas) with heraldry, made in Saxony in 1612
• Covered glass (Deckelhumpen) with heraldry, from Moritzburg Castle, made in Saxony in 1612
• Two footed bowls (Konfektschalen) with heraldry, made in Nuremburg in 1614
• Glass (Hofkellereiglas) with heraldry and animals, made in Saxony in 1621 (also here, here, and here)
• Glass with heraldry, from Moritzburg Castle, made in Saxony in 1621
• Glass (Hofkellereiglas) with heraldry, made in Saxony in 1621

Imperial Eagles (Reichsadlerhumpen, etc.)

• Various 16th century German glasses
• Bottle (Reichsadlerflasche) with an Imperial Eagle and the arms of the Holy Roman Empire, made in Bohemia in 1572
• Glass (Reichsadlerhumpen) with an Imperial Eagle, made in Bohemia in 1583
• Glass with an Imperial Eagle, Bohemia (?), 1588 (also here and here)
• Glass (Reichsadlerhumpen) with an Imperial Eagle and crucifix, made in Nuremburg (?) in 1596
• Beaker (Reichsadlerhumpen) with an Imperial Eagle, made in Bohemia or Germany in 1599
• Glass (Reichsadlerhumpen) with an Imperial Eagle, made in Bohemia in 1602 (also here)

The Prince-Electors (Kurfüstenhumpen, etc.)

• Glass (Kurfüstenhumpen) with the Prince-Electors and inscriptions, Bohemia, 1588 (also here and here)
• Glass with the prince-electors, made in Bohemia in 1597
• Beaker (Kurfüstenhumpen) with the prince-electors, made in Bohemia c. 1600
• Covered glass (Deckelhumpen) with the Prince-Elector of Mainz, made in Saxony in 1617
• Covered glass (Deckelhumpen) with the Prince-Elector of Brandenburg, made in Saxony in 1617 (also here)

Biblical Scenes

• Covered tankard with Herod executing children, made in northern Bohemia (?) in 1578
• Beaker (Stangenglas) with the Annunciation, made in Bohemia in 1592
• Cobalt-blue beaker with Elijah in the desert, made in northern Bohemia or Saxony in 1599
• Glass with the Adoration of the Magi, made in Bohemia in 1604

Hunt Scenes (Jagdhumpen)

• Three enamelled glasses made in late 16th century Germany
• Goblet with a hunt scene, Bohemia, 1576
• Goblet (Passglass) with a stag hunt, made in Bohemia in 1585
• Beaker (Jagdhumpen) with hunt scenes, made in Bohemia or Germany in 1593
• Hunt beaker, end of the 16th century
• Goblet with a stag hunt, made in Bohemia in 1594
• Hunt beaker, made in Germany c. 1600 (also here)
• The Moritzburg Welcome, made in the Saxon-Bohemian Ore Mountains in 1602 (also here)
• Hunt glass from Moritzburg Castle, made in Saxony in 1621

Other Scenes with People

• Glass with ladies and gentlemen and an inscription, made in Bohemia in 1586
• Glass with couples and musicians, c. 1590 (also here, here, here, and here)
• Glass with a couple amongst oversized foliage, made in Germany (?) in 1590
• Covered glass (Stangenglas) with a man riding a horse, 1597 (also here, here, and here)
• Cylindrical glass with a scene of student life, Bohemia? c. 1600
• Glass with ladies and gentlemen, 1604 (also here and here)
• Glass with a lady and gentleman, Franconia, 1610 (also here and here)
• Goblet with ladies and gentlemen and an inscription, made in Bohemia in 1613 (also here, here, here, and here)
• Beaker of the Guild of Smiths & Locksmiths, made in Bohemia or Central Germany in 1614
• Tankard with landscape and seated figures and heraldry, made in Silesia in 1616 (also here)

Other Designs

• Bowl from a footed prunted beaker, made in Bohemia or Venice c. 1525-1575
• Various 16th century German glasses
• Cobalt-blue goblet with gold leaf and enamel decoration, made in central Germany or Bohemia in the second half of the 16th century
• Bowl with green fruit and foliage and goldfinches in cold-painted enamel, made in Innsbruck c. 1570-1591
• Beaker with a satirical scene, made in Bohemia (?) in 1595

• The Fairfax Cup, late 15th century (V&A C.17 to D-1959)