High Quality Content by WIKIPEDIA articles! Saint-Astier is a commune in the Lot-et-Garonne department in south-western France. Lot-et-Garonne is a department in the southwest of France named after the Lot and Garonne rivers. Lot-et-Got-et-Garonne is one of the original 83 departments created during the French Revolution on March 4, 1790. It was created from part of the provinces of Guyenne and Gascogne. Some of the original southeastern cantons were separated from it in 1808 to form the department of Tarn-et-Garonne.