The Basilica of Saint Francis of Assisi, a UNESCO World Heritage Site since 2000, is a testament to the profound impact of Saint Francis on Christianity and the world. Constructed in 1228, this remarkable structure is divided into an Upper and a Lower Church, each adorned with frescoes by medieval Italian masters like Giotto and Cimabue. The basilica not only serves as a place of worship but also as a custodian of history, safeguarding the tomb of Saint Francis and embodying the Gothic style's early presence in Italy.