Milestone of Constantinus 
Milestone of Tacitus 
Detail – 4 miles
Two milestones found in a site called Barrelas close to Famalicão da Serra now on display in Guarda Museum. One is dedicated to Emperor Constantinus and the other to Emperor Tacitus still showing the 4 miles to Centum Cellae (Catraia da Torre, Belmonte)
vide route here – https://viasromanas.pt/#viseu_belmonte