Papyrus Oxyrhynchus 29 (P. Oxy. 29) is a fragment of the second book of the Elements of Euclid in Greek. It was discovered by Grenfell and Hunt in 1897 in Oxyrhynchus. The fragment was originally dated to the end of the third century or the beginning of the fourth century, although more recent scholarship suggests a date of 75–125 CE.[1][2] It is housed in the library of the University of Pennsylvania (in a University Museum, E 2748). The text was published by Grenfell and Hunt in 1898.[3]