[1] His father, Joachim Heinrich Oppenheim, was (from 1858) a rabbi in Jemnice, South Moravia, and later (from 1868 to 1891) in Toruń,[1][2] Prussia, (today in Poland).

For example, on May 7, 1898, at the sixth monthly session of the ZION Society in the Reichert Hall in Olomouc, he gave a lecture on the topic of Humanity in the Old Testament.

[1] He also worked in the Chevra Kadisha and founded the Freitisch-Verein, which supported impoverished Jewish students in Olomouc schools.

Oppenheim traveled everywhere in Palestine: "This way, I have fulfilled my desire of decades to visit the fatherland, to see biblical and historical sites.

Whether he died in a gas chamber, or was killed in a so-called lazaret (which was a group of barracks surrounded by a fence and an adjoining pit full of bodies of wounded men who have resorted to believing that they would find at least elementary care here) is not known.

[1] On the 29 and 30 October 2012, 42 Stolpersteine were laid in Olomouc, including one for Oppenheim and his wife in front of the former building on the Avenue Třída Svobody 24 (later demolished), where he lived until his deportation.