Career
The sources refer to Simeon as Simeon Vratanja. Vratanja was not the name of his family but his later assigned surname, derived from the name of the eparchy. There are different views about the year of establishing of Vretanija as an eparchy of the Patriarchate of Peć.
According to Iohann von Csaplovisc, this eparchy was established in 1578 and its first bishop was mitropolit Gavrilo to whom Simeon was subordinated as archimandrite in Marča.
In 1609 Serbian patriarch Jovan appointed Simeon Vratanja on the position of bishop of all Orthodox Serbs settled to Croatia. According to Aleksa Ivić, this appointment marked establishment of the Eparchy of Vretanja in 1609.
In November 1611 the Pope appointed Simeon as bishop of Slavonia, Croatia and Hungary, while in reality his jurisdiction was limited to Orthodox population of Slavonia and Croatia. The Pope granted all former estates of the Catholic Monastery of All Saints to the Marča Monastery.
In 1611 it had around 60,000 believers.
Simeon continued to use Slavic language, Julian calendar and maintained a connection with Patriarchate of Peć. Simeon died in 1630.