which city with the smallest population of all the members of the Council of Europe Chiesa di Sant'Andrea  located?
San Marino San Marino ( ; ] ), officially the Republic of San Marino (Italian: "Repubblica di San Marino" ), also known as the Most Serene Republic of San Marino (Italian: "Serenissima Repubblica di San Marino" ), is an enclaved microstate surrounded by Italy, situated on the Italian Peninsula on the northeastern side of the Apennine Mountains. Its size is just over 61 sqkm , with a population of 33,562. Its capital is the City of San Marino and its largest city is Serravalle. San Marino has the smallest population of all the members of the Council of Europe.
Sant'Antioco Sant'Antioco (] ; Sardinian: "Santu Antiogu" ) is the name of both an island and a municipality ("comune") in southwestern Sardinia, in the Province of South Sardinia, in Sulcis zone. With a population of 11,730, the municipality of Sant'Antioco it is the island's largest community. It is also the site of ancient Sulci, considered the second city of Sardinia in antiquity.