[2] He became a member of the "Wiener Bauhütte" where he studied under Friedrich von Schmidt, who profoundly influenced his later interest in Middle Ages architecture.

From 1871 he taught architectural drawing at the Budapest Art School, where, as a colleague of Imre Steindl, he helped design Pest's City Hall.

In the course of planning the reconstruction, he did a thorough field survey of the Gothic church to expose the varying original elements of the building to learn how it had been built, rebuilt and enlarged over time.

On the west façade and the spire, where he could find no documentary evidence to assist him, he detailed his own new designs, to the point that the building as it stands today is almost entirely his creation.

In 1903, following Imre Steindl's death, Schulek was appointed professor of medieval architecture at the Technical University of Budapest, a post he held until 1913.

His 1909 design for the Votive Church of Szeged (Fogadalmi templom), a twin-spired structure with red-brick façades and white stone trim, was modified by Ernő Foerk, and construction was completed by 1930.