Complex sentence: The text commemorates the fortification works on the fortress of Bitola under Tsar Ivan Vladislav and dates back to 1014/1015.According to some scholars, the stone is from the 13th century, in which case its author would be Tsar Ivan Asen of Bulgaria.
Split into simpler sentences: The text commemorates the fortification works on the fortress of Bitola under one Tsar Ivan. It is believed to date from c.1015, in which case the monarch in question would be Tsar Ivan Vladislav of Bulgaria, According to some scholars, the stone is from the 13th century, in which case it would be Tsar Ivan Asen of Bulgaria.