Reader title


Nicholas Copernicus
 De Revolutionibus

John Dee
 The Mathematicall Praeface

Robert Recorde
 The Castle of Knowledge

Marcellus Palingenius Stellatus
 The Zodiake of Life

Thomas Digges
 A Perfect Description of the Celestial Orbs

Giordano Bruno
 The Ash Wednesday Supper

Galileo Galilei
 Dialogue Concerning the Two Chief World Systems

Robert Recorde    (c. 1510-1558)

Robert Recorde was one of the most eminent mathematicians and teachers in England during the middle of the sixteenth century, who wrote books on arithmetic, geometry, and astronomy, all in English. Castle ofKnowledge (1556), is a comprehensive textbook on astronomy, written in the form of a dialogue between the Master and his young Scholar. The book is meant to train its reader in traditional astronomy, but Recorde is already familiar with the Copernican theory, which must have become a topic of much interest to astronomers and mathematicians, as this excerpt indicates.

Dartmouth College
Copyright 1999, MATC
Last updated 1 September 1999