Professor Adolf Katzenellenbogen was born in Franfurt-am-Main on 19th August 1901. He died in Baltimore USA in 1964.

In 1924 he obtained his Ph.D. in Law, and in Philosophy (Arts) in 1933. In 1935 he married Elizabeth Martha Holzheu in Zurich, Switzerland. She died in Baltimore in February 1987.

They lived in Kostanz, a town in Germany near the Swiss border. Following the incident of the shooting of the German Embassy in Paris in 1938, Adolf was taken to Dachau in December 1938 where he remained for three weeks.

Due to a chest infection he was transferred by ambulance to Switzerland, where he was hospitalized for six months.

In 1939 he was invited to visit the USA by Professor Ernest Panofsky of Princeton University, to speak at the Institute for Advanced Studies. He arrived in 1939 and on the very next day (September 1st) World War 11 broke out.

Adolf remained in the USA and in 1941 he went to Cuba to obtain an immigrant visa. By July, his wife and daughter had also obtained visas, and the family was reunited in September 1941. He was professor of Medieval Art at John Hopkins University until his death in 1964.

Source

The Unbroken Chain - Neil Rosenstein (1990) Volume 1, Chapter 11, Samuel and Katzenellenbogen families, pp 93 - 4, G 14.1

Who's Who in America (no date provided).
Other details from personal communications and correspondence.

photo cf.: https://www.frankfurt.de/sixcms/detail.php?id=1907322&_ffmpar[_id_inhalt]=27756329