Marcasia [mɑ:'keɪʒə] (Arithide Marcassein /mɔ'kassi:n/, Dethric Marcasan /'markəsa:n/) is the second largest of five continents on the planet Ilethes, after Istheusia, and straddles the equator, spanning five climate zones. Due to its almost-round shape and its location at the centre of all the continents, it is sometimes called the "gem of the world", or the "pearl continent".
The Irus River delta on the Artya coast is one of the three cradles of civilisation of the world, and its surrounding plains, nourished over the millenia by the shifting course of the Irus, are the most fertile in the world.
| Note on transliteration in this article:|
This article makes use of more than one transliteration scheme for toponyms due to historical factors. While modern political names employ the respective transliteration schemes of the local languages concerned scheme, geographical features known to the Classical world are transliterated by the Vesian system. This is not nonstandard text, substandard work or ignorance on the part of the article's author.