Rkatsiteli

Rkatsiteli is a kind of grape used to produce white wine. This ancient vinifera originates in Georgia and is supposed to be one of the oldest grape varieties. Rkatsiteli was the most widely planted grape variety in the Soviet Union and, by 1978, was responsible for 18% of all Soviet wine production. There it was used to make everything from table wine to liqueurs to Sherry-like fortified wine. Before President Gorbachev's vine pull scheme, it was possibly the world's most widely planted white wine grape.

Source: Wikipedia