{blank century} 56

  10th century 1

  10th-8th century BCE 1

  16th century BCE 1

  16th century BCE or later 1

  18th century 5

  18th-19th century 8

  19th century 14

  19th-20th century 2

  1st century 4

  1st century BCE 5

  1st century BCE-1st century CE 1

  1st or 2nd century 3

  1st or 2nd century 1

  1st-2nd century 6

  20th century 1

  2nd century 2

  3rd century BCE 5

  4th century BCE 16

  4th century BCE or later 1

  4th-1st century BCE 6

  4th-3rd century BCE 2

  5th century BCE 13

  5th-4th century BCE 3

  6th century BCE 6

  6th-5th century BCE 5

  7th-6th century BCE 3

  8th century 1

  8th century BCE 1

  8th-7th century BCE 2

  9th-8th century BCE 1

  Early 18th century 2

  Mid-20th century 2

  {blank country} 61

  Assyrian 2

  China 6

  Costa Rica 16

  Cyprus 2

  Ecuador 4

  Egyptian 6

  England 4

  France 1

  Germany 1

  Greece 38

  Italy 6

  Japan 1

  Mexico 16

  Spain 2

  Switzerland 1

  United Kingdom 7

  United States 7

  {blank period} 116

  Greco-Roman? 4

  Hellenic 2

  Hellenistic 12

  Meiji Period (1868-1912) 1

  New Kingdom Egyptian 1

  Pre-Columbian 36

  Roman 2

  Roman Imperial 6

  Roman Republic 1