The prosecutor said the gas deals inflicted damage to the country amounting to more than 1.5 billion hryvnias (almost $190 million at the exchange rate at the time). In addition to the sentence, the court ruled she must repay the money.
Amnesty International slammed the verdict as "politically motivated" and called for the release of Tymoshenko, who was Prime Minister from January to September 2005, and December 2007 to March 2010.
The case against her was widely considered politically motivated, and the United States and other Western nations called her "a political prisoner."
Her activism work continued while she was behind bars. Two years ago, she went on a hunger strike to draw attention to "violence and lack of rights"after she was allegedly beaten unconscious by guards. She ended her hunger strike after three weeks and agreed to receive medical treatment.
Tymoshenko was freed Saturday after parliament ordered charges against her dropped.
She went from her hospital bed, and into the twists and turns of Ukrainian politics.