Analysis of information sources in references of the Wikipedia article "Shirgj Church" in English language version.
It is surmised that the church was founded in Justinian times, around 535, with the spread and especially with the imperial patronage of the cult of its patron saints, two Roman Christian soldiers martyred in Syria in the 4th century. [...] According to the testimony of the Chronicle of Bar, although a source considered unreliable, this basilica became the royal mausoleum of the 11th century Serbian Vojislavljević dynasty who ruled over Zeta and thus the burial place of kings Mihajlo and Bodin and their heirs, Vladimir and Gradihna. Documents form Kotor indicate that in 1166 the abbot of Sts Sergius and Bacchus, Petar, was present at the consecration of the cathedral of St Tryphon in Kotor and at that time, towards the end of the 12th century, Shkodër and its environs became a part of the Serbian Nemanide state
