Tomasz I (d. 1268) was a Bishop of Wrocław, Poland in the thirteenth century.
[2] He is considered one of the most significant bishops of Wrocław diocese and is known for his role in the Germanification of Silesia, building programs, and promoting church interests in secular politics.
He promoted the process of German colonization in Silesia that resulted in Wrocław being known by the German name Breslau and establishing a demographic feature that was of major significance in World War II.
He began the construction of the Gothic-style Wrocław Cathedral, with the chancel being erected in 1244.
Ladislaus, a grandson of Saint Hedwig, and Archbishop of Salzburg, was Administrator of the Diocese of Wrocław between the death of Tomasz and the accession of Thomasz's nephew and canon, Tomasz II.