This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Richard of Wallingford. Miniature of Richard of Wallingford Abbot of St Albans mathematician and inventor of mechanical astronomical clock He is shown seated at his desk measuring with pair of compasses Title of the book History of the abbots of St Albans Author Thomas of Walsingham Date th century Language Latin The first version