| Millennium: | 2nd millennium |
| Centuries: | 11th century – 12th century – 13th century |
| Decades: | 1140s 1150s 1160s – 1170s – 1180s 1190s 1200s |
| Years: | 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
| Categories: | Births – Deaths – Architecture Establishments – Disestablishments |
The 1170s decade ran from January 1, 1170, to December 31, 1179.