Siena is a smaller city a bus ride away from Florence. One of my favorite parts of the city is the main church, partially because of its impressive facade, though more because it was meant to be far larger than it actually is; you can still see much of the fragmentary construction around the completed nave. Another clue is the fact that the church is oriented north-south instead of the traditional east-west.
Notice also the medieval music notation. This system appears to be mensural (meaning measured) notation, which was most common in the 13th century. You can see they only have four staff lines, whereas modern notation uses five (although there have been notations which use up to eleven at once!)