Who wrote both the words and the music for the opera '' Lohengrin ''?

Lohengrin is an opera in three acts by Richard Wagner. It is based on an old German legend. It was first performed in Weimar, Germany on 28 August 1850 with Franz Liszt conducting. Liszt chose to conduct it on that particular day because 28 August was the birthday of Johann Wolfgang von Goethe who had lived in Weimar.