Tag Archives: Gregory XIII

Just Too Cool: a stamp … yes… a stamp

Posted on 19 June 2012 by Fr. John Zuhlsdorf

Some of you long-time readers know that I sometimes write about things astronomical and that I have mentioned the fascinating Jesuit mathematician Christopher Clavius (+1612), who worked out the reform of the calendar for Pope Gregory XIII.
For your Just Too Cool … Continue reading →

Posted in Just Too Cool, Linking Back, Look! Up in the sky! | Tagged , | 8 Comments