Education
Pecz studied at a number of universities both at home and abroad in Stuttgart. He later studied at the Vienna Academy of Fine Arts under the Danish architect Theophil Hansen, the builder of the Parliament, Musikverein and Stock Exchange buildings in Vienna.
Career
After returning to he worked with Frigyes Schulek on the Matthias Church in Buda and later in the offices of Alajos Hauszmann. At this time he familiarised himself with gothic architecture, particularly in church design. Later, Pecz worked in the technical university under Schulek and Imre Steindl and became a lecturer is 1887.
He was 34 years old when he became the dean of the building faculty which he continued to be until his death.
He designed numerous buildings in the historicist tradition, often employing Zsolnay tiles to rich effect. Introduction to Greek stonework (A görög kőszerkezetek ismertetése) (, 1886) On the development of ancient Christian architecture(Az ókeresztény templom-építészet fejlődése0 (, 1886).