These tumulus burials, which had already appeared earlier at Leucas in the Ionian Sea, may reflect Balkan practice.

…in the western islands, where he unsuccessfully besieges the Corinthian colony of Leukas.

…Leucas, which have been captured and secured by Margarito of Brindisi, an Apulian pirate of Greek origin from Zante, who in 1184 had become Admiral of Sicily.

The Ottoman admiral appears at Cape Santa Maria on the Island of Lefkada, before ending the campaign in November and returning to Constantinople.