There are many variations of in which order the labors were assigned, some versions use the order in which the metopes (carved stone panels between the triglyphs, which are on the architrave of the entablature) from the "Temple of Zeus Olympia" are arranged. Others are from ancient or classical scholars, but no matter in what order they are arranged they are still the same in content. The order in which they are presented here seems to be the most popular.
- The Nemean Lion.
- The Lernaean Hydra.
- The Erymanthian Boar.
- The Ceryneian Hind.
- The Stymphalian Birds.
- The Augean Stables.
- The Cretan Bull.
- The Mares of Diomedes.
- The Girdle of Hippolyte.
- The Cattle of Geryon.
- The Apples of the Hesperides.
- The Capture of Cerberus.
No matter which version is used the slaying of the Nemean Lion is always the first labor Heracles undertakes.