thumb|250px|Drawing of Ptolemy IV's Thalamegos, by Nicolaes Witsen, 1671
thumb|250px|Drawing of Ptolemy IV's Thalamegos, by Nicolaes Witsen, 1671
Thalamegos (plural: Thalamegoi) was a type of houseboat, yacht, or barge mainly found in the Nile River, Egypt. They were used as freight carriers and ferry. The most famous and largest thalamegos was a huge twin-hulled catamaran, a two-story Nile River palace barge that was commissioned by Hellenistic king Ptolemy IV Philopator for himself and his wife Arsinoe III ca. 200 BCE.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).