 During the Spanish invasion of Portugal during the Peninsular Wars it was a point of resistance; the Count of Schaumburg-Lippe-Bückeburg, William, established a line of defence in Souto as part of his intervention, under the authority of the Marquess of Pombal to protect Portugal.Souto received its parish status on 21 October 1629.The civil parish is located in the northern part of the municipality, neighbouring the parishes of Fontes (to the north); Carvalhal (to the east); São Vicente and Aldeia do Mato (to the west); separated from the municipality of Tomar by the Tagus River.