History of the Republic of Venice of the Sea" ceremony was established in this period. Orseolo died in 1008. Venice's control over the Adriatic was strengthened by an expedition by Pietro's son Ottone in 1017, by which time Venice had assumed a key role in balancing power between the Byzantine and Holy Roman Empires. During the long Investiture Controversy, an 11th-century dispute between Henry IV, Holy Roman Emperor and Pope Gregory VII over who would control appointments of church officials, Venice remained neutral, and this caused some attrition of support from the Popes. Doge Domenico Selvo intervened in the war between the Normans of Apulia and
Levantine Sea Levantine Sea stretches over an area of . The northern part of the Levantine Sea between Cyprus and Turkey is called the Cilician Sea. Also in the north are two large bays, the Gulf of İskenderun (northeast) and the Gulf of Antalya (northwest). The Leviathan gas field is located in this area under the Levantine basin in the southeastern part of the Mediterranean. To the west of the Levantine Deep Marine Basin is the Nile Delta Basin, followed by the Herodotus Basin, large and up to deep, which – at a possible age of 340 million years – is believed