1178

Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1140s  1150s  1160s  – 1170s –  1180s  1190s  1200s
Years:	1175 1176 1177 – 1178 – 1179 1180 1181

1178 Media

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  Fresco of George III (r. 1156–1184)

1178 (MCLXXVIII) was a common year starting on Sunday of the Julian calendar, the 1178th year of the Common Era (CE) and Anno Domini (AD) designations, the 178th year of the 2nd millennium, the 78th year of the 12th century, and the 9th year of the 1170s decade. As of the start of 1178, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Events

• June 18 – Five Canterbury monks see what was possibly the Giordano Bruno crater being formed
• The Sung Document written detailing the discovery of "Mu-Lan-Pi" (suggested by some to be California) by Muslim sailors
• The Chronicle of Gervase of Canterbury written
• The Leaning Tower of Pisa begins to lean as the third level is completed