State Archives of Modena:
Topography of the County of Bologna

Territory of the Bolognese and Ferrarese countryside, between Este, Modena, the Via Emilia and the sea, with the mouths of the Adige and the Po. With the coat of arms of the Municipality of Bologna. Paper on canvas, ink and tempera, 129 x 123 cm. State Archives of Modena, Estense Mapbook, Large Maps, no. 11
"Topography and Hydrography of the County of Bologna from the north of the Via Emilia and of the Duchy of Ferrara from the east of the Po Grande to Marina with the part of Romagna and Modena below the said road. Delineated and described by Matteo Borboni, painter of the year 1438. Taken from the original made by the former Vincenzo Sassi in the year 1432. Scale of four miles. Bolognese of 500 perches per mile. Scale of six miles. Ferrarese of 333.5 perches per mile."