In 1543 Luther sent Hieronymus Nopus as preacher to Regensburg at the request of the city council and with him went Gallus, who was ordained by Bugenhagen in April.
In June, 1553, Prince Wolfgang of Anhalt called him to his native city to assist in the settlement of the administration of the church property.
It probably angered him that Gallus had republished (1554) his Sententiae veterum de coena Domini, which was directed against Oecolampadius.
In 1561 Gallus warned the princes convened at Naumburg of the spreading Calvinistic doctrine of the Lord's Supper (see: Crypto-Calvinism).
In this connection may be mentioned Gallus' writing directed against Corpus Christi day: Vom abgöttischen Fest, Frohnleichnams-Tag genannt (1561).