It goes without saying that the textile industry at Chieri is very old but the dyery tradition in Chieri is none the younger. In fact, even in the 13^th century a district existed, and still does today, that was then called, at least officially, Jalvo and is now Gialdo, with a gate galled "Porta Gialdo" that was to be found more or less where today the church of the Benedictine monks can be found. Then the old "Chieresi", who were not content with having a district named Gialdo, gave the name Gualderia to a road that is now almost in the centre of the town, running from Via Principe Amedeo to Piazza San Domenico, parallel to the course of the River Tepice, which for opportune reasons was intended for "water provision and drainage". It was not by chance that "gualdo" (woad) dye houses were situated there. The last one to go was the "Tintoria Parigi" that ceased trade a little after the mid 900's. "Via del Gualdo", situated in the "Porta del Nuovo" district and a junction of Via San Pietro and Via Principe Amedeo, was thus called because of the "gualdo" (woad) mills situated there (nowadays most probably occupied by the "Consorzio Agricola" i.e. The Agriculture Syndicate) and was near the chemistry laboratory situated in the ex-Cistern monastery of Sant'Andrea (demolished in 1963 to build the school today on Via Tana) where the Piedmontese Giovanni Antonio Giobert of Mongardino d'Asti was a chemist and wrote the famous "Traité sur le Pastel" (1813 - Napoleon period).