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180s

Centuries: 1st century - 2nd century - 3rd century

Decades: 130s - 140s - 150s - 160s - 170s - 180s - 190s - 200s - 210s - 220s - 230s

180 181 182 183 184 185 186 187 188 189

Events:

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Stone of the Sun

... the numerals one to thirteen, e.g., 1 Cipactli, 2 Eecatl, 3 Calli, and so on to 13 Acatle, which was followed by 1 Ocelotl, 2 Quauhtli, etc. There being no common factor to ...