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
Yenisei Gulf Yenisei Gulf The Yenisei Gulf (, "Yeniseiskiy Zaliv") is a large and long estuary through which the lower Yenisei River flows into the Kara Sea. The Yenisei Gulf and its islands belong to the Krasnoyarsk Krai administrative division of the Russian Federation and is part of the Great Arctic State Nature Reserve, the largest nature reserve of Russia. The Willem Barents Biological Station is a Polar station located northeast of Meduza Bay, at the northern end of the mouth of the Yenisei (). The Yenisei Gulf is formed by the river widening to an average of for up to in