Lechner's exact place of birth is unknown. The by-name he occasionally used, "Athesinus", refers to origins in the Adige Valley in what is now the Italian province of South Tyrol. He died in Stuttgart.
- Free scores by Leonhard Lechner in the Choral Public Domain Library (ChoralWiki)
- Free scores by Leonhard Lechner at the International Music Score Library Project