Exploratory excavations carried out in Schwarzenberg am Böhmerwald, Upper Austria, uncovered the remains of an unrecorded glassworks. Part of a furnace was exposed, along with glass beads and buttons, as well as holloware and flat glass fragments from the 17th and early 18th centuries. This article describes the finds and their relationship to the nearby Sonnenschlag glassworks where similar beads and glassware fragments have been collected. Both sites are related to the beadmaking industry in the nearby Bavarian and Bohemian forests, which experienced a veritable bead boom around 1700.