1835 Born on the 4th of December in Friedingen, a.d. Donau (on the Danube), Tuttlingen Rural District, (during this time period Württemberg, today Baden-Württemberg), Germany.
Rottwiel Academic High School (Gymnasium). Weingarten Teachers' Seminary. Musical studies in Stuttgart and Karlsruhe as well as Basel, Switzerland.
Organist and choir director at the St. Klara Church, Basel.
1865 Teacher, choir director and organist in Oberstadion (Alb-Donau Rural District)
1875 Music seminar teacher at the Royal Teacher's Seminar in Metz. Seminar senior schoolmaster. Royal Music Director in Metz.
1909 Retirement
1915 Died on 23rd of December.
Founded a school for singing and a piano school. Editor and publisher of a collection of songs.
Composer of church music. Significant organist of his time. Holder of the Order of the Crown, 3rd Class and the Order of the Red Eagle, 4th Class.
Brother of the music director in Ettling Benjamin Hamma (born on October 10, 1831 in Deißlingen, died on June 2, 1911 in Stuttgart) and the musician and violin maker Fridolin Hamma (12/14/1818 – 06/14/1892).
Taken from (originally in the German language):
http://www.schwaebische-orgelromantik.de/personen/hamma-franz/hamma-franz.htm