Macaerus was a castle of the Herodian rulers on the southern border of their Perean territory, east of the Dead Sea. It was a fortified stronghold and residence connected in tradition with the imprisonment and execution of John the Baptist.
The supplied material associates Macaerus with John the Baptist’s imprisonment and with the banquet at which Herodias requested his death. The Gospel account itself does not name the fortress.
Macaerus stood about nine miles east of the northern end of the Dead Sea. It was fortified and used by the Herods. Its identification with the site of John’s death is disputed in the supplied material, which notes that the feast may have been held at Tiberias.