which city with the smallest population of all the members of the Council of Europe Chiesa di Sant'Andrea  located?
Chiesa di Sant'Andrea (Serravalle) Chiesa di Sant'Andrea (Serravalle) is a church located in Serravalle, San Marino. It was built in 1824 over the ancient walls of the former city. It belongs to the Roman Catholic Diocese of San Marino-Montefeltro. It was built in 1824. The church was dedicated to St. Andrew and the Virgin Mary.
Quartu Sant'Elena Quartu Sant'Elena ] (Sardinian: "Cuartu Sant'Aleni" ), located four miles East from Cagliari on the ancient Roman road, is a city and "comune" in the Metropolitan City of Cagliari, Sardinia, Italy. It is the third biggest city of Sardinia with a population of 71,216 as of 2015 .