Agostino Fantastici (1782 – 1845) was an Italian scenic designer and architect, mainly active in Siena, Italy.
He was born in Montalcino, but his father Bernardino was a teacher of arithmetic and perspective associated with the University of Siena.
In 1809, he returned to Siena and worked for a couple of years alongside Lorenzo Turillazzi.
[1] His work as an architect in Siena often led him to antiquarian reconstructions, often attempting to replicate or emulate the original design of the building.
His monograph, Vocabolario di architettura: prima edizione was republished in 1994.