The Xenokrateia Relief is a marble votive offering, dated to the end of the fifth-century BCE. It commemorates the foundation of a sanctuary to the river god Kephisos by a woman named Xenokrateia.
The relief, currently on display at the National Archaeological Museum in Athens (NAMA 2756), was found in Neo Phaliro in 1908, in the area inside the Long Walls, which in Antiquity connected the harbor of Piraeus with Athens proper, around the walls’ intersection point with the bed of the Kephisos river. It is dated on stylistic grounds to 410 BCE, and is made of Pentelic marble, while the pillar on which it stands is made of limestone.