Lech Aleksander Kaczyński (Polish pronunciation: [ˈlɛx alɛkˈsandɛr kaˈt͡ʂɨȷ̃skʲi] ( ); 18 June 1949 – 10 April 2010) was a Polish lawyer and politician who served as the President of Poland from 2005 until 2010 and as Mayor of Warsaw from 2002 until 22 December 2005.