 Many of the original Medieval elements of the historic centre on Mount Titano have been preserved and the site is on the UNESCO World Heritage list .The historical centre of San Marino dates back to the thirteenth century and includes many Medieval architectural features such as fortification towers, bastions, gates and walls.The city centre also comprises the Titano Theatre (dating back to the eighteenth century), the neoclassical San Marino Basilica, and convents dating from the fourteenth and sixteenth century respectively.