Formerly considered a work of Filippo Brunelleschi, it is now thought that he was responsible for the plan, which is based on simple geometrical forms,[1] the square and the circle, but not for the building's execution and detailing. A façade that he had begun, and of which only the lower register can be seen, was partially obscured by the addition of a porch. The main inspiration for this piece was the Dominican monastery of Santa Maria Novella, also located in Florence.