Geneva 15.7%. Of the agricultural land, 0.3% is used for growing crops. Of the water in the municipality, 0.2% is composed of lakes and 2.9% is rivers and streams. The altitude of Geneva is , and corresponds to the altitude of the largest of the Pierres du Niton, two large rocks emerging from the lake which date from the last ice age. This rock was chosen by General Guillaume Henri Dufour as the reference point for surveying in Switzerland. The second main river of Geneva is the Arve, which flows into the Rhône just west of the city centre. Mont Blanc
Canton of Geneva great influence on the canton, which essentially consists of the city and its hinterlands. Geneva was controlled by the Allobroges tribe until 121 BC. It was annexed to the Roman Empire in 121 BC and remained its part until 443. In 443, Burgundians took over Geneva. In 532, the land controlled by Burgundians became part of the Frankish Empire. Geneva became a part of the Kingdom of Burgundy in 888. Geneva became a part of the Holy Roman Empire in 1032 and officially remained in it until the Peace of Westphalia. The Prince-Bishopric of Geneva was a Prince-Bishopric of the