From the 14th century English epic poems were written in heroic couplets,and rhyme royal,though in the 16th century the Spenserian stanzaand blank versewere also introduced. The French alexandrine is currently the heroic line in French literature, though in earlier literature – such as the chanson de geste – the decasyllable grouped in laisses took precedence. In Polish literature, couplets of Polish alexandrines (syllabic lines of 7+6 syllables) prevail.In Russian, iambic tetrameter verse is the most popular.In Serbian poetry, the decasyllable is the only form employed.