The Associazione Chiese di Venezia (tel. 041-275-0462; www.chorusvenezia.org) now curates most of Venice's top churches. A visit to one of the association's churches costs 2.50€ ($3); most are open Monday to Saturday 10am to 5pm and Sunday 1 to 5pm. The churches are closed Sundays in July and August. If you plan to visit more than four churches, buy the 9€ ($11) ticket (valid for 1 year), which allows you to visit all of the following churches: Santa Maria del Giglio, Santo Stefano, Santa Maria Formosa, Santa Maria dei Miracoli, Santa Maria Gloriosa dei Frari (reviewed here), San Polo, San Giacomo dell'Orio, San Stae, Alvise, Madonna dell'Orto, San Pietro di Castello, Il Redentore (reviewed here), San Sebastiano (reviewed here), and San Marco cathedral's treasury. The association also has audio guides available at some of the churches for .50€ (65¢).