Centuries: 12th century - 13th century - 14th century
Decades: 1170s 1180s 1190s 1200s 1210s - 1220s - 1230s 1240s 1250s 1260s 1270s
Years: 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
... optic gyroscope wikipedia.org dumped 2003-03-17 with ...
