Thalamegos

Thalamegos (Ancient Greek: θαλαμηγός = conductor of the room (the rooms) of θάλαμος,-οι (thalamos, Pl-oi) = apartment, apartments, ἡγεῖσθαι (hegeísthai), lead) was a 115 by 14 m (377 by 46 ft), 20 m (66 ft) high, two-story Nile river palace barge. The huge twin-hulled catamaran was commissioned by Hellenistic king Ptolemy IV Philopator for himself and his wife Arsinoe III ca. 200 BCE.