In 2019, a metal-detector find of an exceptionally well-preserved weapon was made in the complex of Ždánice Forest. We can classify it as a long-sword of Type XVIa, H1, 1b (according to Oakeshott 1964; Głosek 1984, 39–40, Fig. 4) and date it to the turn of the 15th century. Its blade was marked on both sides with three marks taking the form of a forked cross, a diagonal consisting of three equilateral crosses and, finally, a bishop's crosier. The weapon was assembled from a blade of Passau provenance and hilt-components characteristic of the wider Central European region. These and other facts concerning the sword were obtained through detailed analysis, which this study introduces.