Wratislaus of Brno, Duke of Moravia, (Czech: Vratislav Brněnský, German: Wratislaus von Brünn, Latin: Wratislaus Brunensis, Russian: Вратислав (князь Брно); died 1146) was the Duke of Moravia for twenty years - between 1125-1129 and 1130 - 1146 (4+16 years - the second stage 1130-1146)). He was the first son and successor of Ulrich I, of Brno (+1092) and unknown princess (probably Slavic origin). He did not succeed as half monarch of Moravia (diarch), for all half of Moravia (the west one) as his father Ulrich I, but Brno was already divided into two parts: Brno and Znojmo and his father Ulrich was co-monarch in this part with his uncle Luitpold of Znojmo. Both brothers together later established a benedictine cloister and its St. Procopius Basilica in Třebíč and prepared as mausoleum for Brno-Znojmo branch House of Přemyslid. Wratislaus himself probably initiated the establishment of the Royal cathedral chapter of St. Peter and Paul in Brno, formally created later in 1292. He had long ruled over Moravia (as diarch in Brno) for 20 years, once interrupted by illegitimate regency: (1128-1130 by Soběslav I) By his marriage(1132) to a Russian princess, he probably had two (three ?) children:

He was succeeded legitimately as prince of Brno by his son Spitihněv of Brno (1146)

Wratislaus initially ruled in the Brno part (the western one) of the duchy of Moravia, until 1129 when they were evicted illegitimately by Bretislaus II. Later (1130) they enforced a return of the Brno part of the Moravian duchy - according to the principles of agnatic seniority. After they returned to the duchy of Brno, the brothers divided it into two subparts named Brno (principality) and Znojmo (principality), where they continued to reign in certain local territorial union. In 1104 his father and uncle together founded a Benedictine abbey in Třebíč whose convent church of St. Procopius was intended as their own dynastic mausoleum where they were both buried.

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