Ruins on the plateau "Grădiște" shows that the Castra of Tihău was a Roman fort of auxiliary troop, pertaining to the northwest sector of Limes Porolissensis.

Repeated discoveries of Roman archaeological materials (pottery, tiles and bricks, arms, tools, diverse objects, tegular stamps, coins, even stone inscriptions etc.

The castra was known and put on contribution in the debate of various military issues of Roman Dacia-based only on few fortuitous discoveries and some land surface observations.

[4] First systematic excavations, that actually were only information surveys, were taken in 1958, within the pale of archaeological site of Porolissum, where performed its works a large group of researchers, led by regretted professor Mihail Macrea.

Only eastwards the perspective closes by nearby hills, that stretch along the valley of Gârbou River and to the namesake village.