The last buildings on the south side of the road before its end on piazza Rusticucci were the church of San Lorenzo in Piscibus ("St. Lawrence in the fish market", still existing, although stripped of its baroque superstructures and decorations and hidden in the yard of the southern propylaea of Saint Peter's Square) and the Palazzo Alicorni, a severe Renaissance palace demolished in 1931 to delimit the border of Vatican City after the signing of the Lateran treaties .