After finishing school, he studied at the Polytechnic Institute.

The main purpose of Polytechnic Institutes is to train people in various trades.

Polytechnic Institutes are technological universities, many dating back to the mid-19th century.

The Polytechnic Institute, with 5,000 students, concentrated on engineering and mining.

In 1900 he started working in the Polytechnic Institute as a history of art professor.

He stayed at the Polytechnic Institute for 31 years, until mandatory retirement.

He continued to teach at the Polytechnic Institute until 1926.

From 1972 until 1993, he was a lecturer in history at the Polytechnic Institute.

From 1943 to 1945, he was at the Polytechnic Institute of Brooklyn.

He returned to the Polytechnic Institute and obtained his doctoral degree within a year.