June 1871. The original French lyrics of The Internationale were written by Eugène Pottier.
The Internationale from Wikipedia https://en.wikipedia.org/wiki/The_Internationale
Various recordings of The Internationale on Youtube https://www.youtube.com/results?search_query=The+Internationale+
THEY ALL SANG THE INTERNATIONALE - David Rovics https://www.youtube.com/watch?v=NB5x-3mzRPk&list=RDC44Zk6yFsso&index=22
They All Sang the Internationale Lyrics and recordings from Songs of Social Significance https://www.davidrovics.com/songbook/they-all-sang-the-internationale/