Career

Glaser produced prints between 1540 and 1572. He died in June 1573. Glaser is most-known for printing a broadsheet news article on April 14, 1561 describing a mass sighting of a celestial event or unidentified flying objects that occurred over Nuremberg on April 4 of the same year.

The broadsheet, illustrated with a woodcut engraving and text, is preserved at the Zentralbibliothek Zürich in Zurich, Switzerland.

lieutenant describes objects of various shapes including crosses, spears, discs, a crescent, and a tubular object from which several smaller, round objects emerged and darted around the sky at dawn.