al-Qasr wa as-Sayyad () is a village in Nag Hammadi district of Qena Governorate, Egypt.
An early center of Christianity in the Thebaid, Roman Egypt, a site frequented by Desert Fathers from the 3rd century and the site of a monastery from the 4th, it was earlier known as Chenoboskion (Greek "geese pasture"), also called Chenoboscium , Chenoboskia (, ) and Sheneset (, ).
The Nag Hammadi library, a collection of 2nd-century Gnostic texts discovered in 1945, was found at Jabal al-ṬÃÂrif in the Nile cliffs to the north-west.
At Chenoboskion, St Pachomius was converted to Christianity in the 4th century. Pachomius retreated to this place, having ceased his military activity sometime around 310-315 (the approximate figure given is 314), and converted to Christianity whilst dwelling in the desert. There is a monastery located at Chenoboskion that is dedicated to St Pachomius.
People moved to the region to be near Saint Anthony the Great. A monastic community formed around the saint for the purpose of spiritual guidance, beginning in Pispir and from there moving eastward. The mountainous area east of Pispir is the place of the present Monastery of Saint Anthony. The settlement of Chenoboskion created from this eastward movement began in the Thebaid.