Polish lawmaker from the ruling party Malgorzata Gosiewska confirmed that Saakashvili was in Warsaw and that he attended the celebration on Thursday.
In late July, Ukrainian President Petro Poroshenko revoked Saakashvili's Ukrainian citizenship, when it was discovered that ex-governor of Odessa had violated Ukrainian law by providing incorrect information on his citizenship application. Saakashvili was in the United States at the time when Poroshenko made his decision.
In November 2013, Saakashvili left Georgia as Giorgi Margvelashvili became the country's president. Georgian prosecution pressed criminal charges against Saakashvili in absentia, accusing him of embezzling immense sums from the state budget for personal use.
In May 2015, Saakashvili was appointed governor of the Ukraine’s Odessa region on initiative of Poroshenko, and stripped of his Georgian citizenship upon receiving a Ukrainian passport. However, Saakashvili resigned in November 2016, stating that the Ukrainian authorities did not want to fight corruption.