Some of the lyrics were written by Guy Protheroe in an imaginary language similar to Latin, but deliberately devoid of any exact meaning.

In 2008, the project saw a significant departure from its previous themes and presented a more electronic soundscape with Arabic influences in its fourth album, Reborn.

Era mixes Gregorian chants and occasionally world music with contemporary electronic and pop-rock arrangements.

Era's lyrics are written in Latin and English, and some are based on beliefs of the Cathars, a 13th century sect of French heretics.

[citation needed] Era's live shows and music videos often feature artists dressed in medieval or traditional clothes and armour.