Euclid They follow the same logical structure as "Elements", with definitions and proved propositions. Other works are credibly attributed to Euclid, but have been lost. The European Space Agency's (ESA) Euclid spacecraft was named in his honor. Euclid Euclid (; – "Eukleídēs", ; fl. 300 BC), sometimes given the name Euclid of Alexandria to distinguish him from Euclides of Megara, was a Greek mathematician, often referred to as the "founder of geometry" or the "father of geometry". He was active in Alexandria during the reign of Ptolemy I (323–283 BC). His "Elements" is one of the most influential works in the
Ptolemy IV Philopator major antagonist of the apocryphal 3 Maccabees, which describes events following the Battle of Raphia, in both Jerusalem and Alexandria. Ptolemy IV's reign was also marked by trade with other contemporaneous polities. In the 1930s, excavations by Mattingly at a fortress close to Port Dunford (the likely Nikon of antiquity) in present-day southern Somalia yielded a number of Ptolemaic coins. Among these pieces were 17 copper mints from the reigns of Ptolemy III, Ptolemy IV and Ptolemy V, as well as late Imperial Rome and Mamluk Sultanate coins. Ptolemy IV Philopator Ptolemy IV Philopator (, "Ptolemaĩos Philopátōr" "Ptolemy, lover of