Hippocampus (mythology) landwards through vast underground caverns and aquifers, rising replenished and freshened in springs. Thus it was natural for a temple at Helike in the coastal plain of Achaea to be dedicated to "Poseidon Helikonios", (the Poseidon of Helicon), the sacred spring of Boeotian Helikon. When an earthquake suddenly submerged the city, the temple's bronze Poseidon accompanied by hippocampi continued to snag fishermens' nets. Likewise, the hippocampus was considered an appropriate decoration for mosaics in Roman thermae or public baths, as at Aquae Sulis modern day Bath in Britannia ("illustration, below"). Poseidon's horses, which were included in the elaborate sculptural program
Insula (Roman city) forum around which the most important public buildings would be sited. Insula (Roman city) An insula (Latin for "island") is a city block in an ancient Roman city plan, i.e. one that is surrounded by four streets. The term was also used for apartment buildings that took up an entire city block. A standard Roman city plan was based on a grid of orthogonal streets and was probably founded on the ancient Greek model of Hippodamus and was used when new cities were established, e.g. in Roman coloniae. The main streets of each city would be the Decumanus Maximus (east–west-oriented)