Sorelle Piredda

For haute couture with history, search out this oh-so-stylish Castello boutique. The shop itself is a sight, set over a Punic cistern and ancient Roman streets, but it's the imaginative designs of the Piredda sisters that steal the limelight: slinky evening dresses, capes and intricate shawls inspired by ancient Sardinian motifs and traditional island costumes.