His death took place at the convent of Ara Coeli, near Padua, on the 13th of June 1231.
The Scala Coeli of Joh.
The Hessian star catalogue was published in Lucius Barettus's Historia coelestis (Augsburg, 1668), and a number of other observations are to be found in Coeli et siderum in eo errantium observationes Hassiacae (Leiden, 1618), edited by Willebrord Snell.
Lychnis Coeli-rosa: hardy, t2 ft., rosy-purple, with pale centre; pretty.
He also edited Coeli et siderum in eo errantium observationes Hassiacae (1618), containing the astronomical observations of Landgrave William IV.