The dynasty lent the region its name, uniting the entire coast under their suzerainty. The fall of the Cheras in the 15th century CE at the hands of the Cholas proved to be the catalyst of a distinct Malayali identity, wading away from the Tamil cultural sphere of influence over several millennia. The Malayalis live in a historic area known as the Malabar coast, which for thousands of years has been a major center of the international spice trade, operating at least from the Roman era with Ptolemy documenting it on his map of the world in 150 AD. For that reason, a highly distinct culture was created among the Malayali due to centuries of contact with foreign cultures through the spice trade. The arrival of the Cochin Jews, the rise of Saint Thomas Christians, and the growth of Mappila Muslim community, in particular, were very significant in shaping modern-day Malayali culture. Later, Portuguese Latin Christians, Dutch Malabar, French Mahe, and British English, which arrived after 1498 left their mark through colonialism and pillaging their resources. In 2017, a detailed study of the evolution of the Singapore Malayalee community over a period of more than 100 years was published as a book: From Kerala to Singapore: Voices of the Singapore Malayalee Community. It is believed to be the first in-depth study of the presence of a NRI Malayalee community outside of Kerala. Language and literature According to scholars, the Malayalam language is descended from a dialect of the Tamil Language spoken on the Malabar coast, and largely arose because of its geographical isolation from the rest of the Tamil speaking areas. The Sangam literature can be considered as the ancient predecessor of Malayalam. Malayalam literature is ancient in origin, and includes such figures as the 14th century Niranam poets (Madhava Panikkar, Sankara Panikkar and Rama Panikkar), whose works mark the dawn of both modern Malayalam language and indigenous Keralite poetry. Some linguists claim that an inscription found from Edakkal Caves, Wayanad, which belongs to 3rd century CE (approximately 1,800 years old), is the oldest available inscription in Malayalam, as they contain two modern Malayalam words, Ee (This) and Pazhama (Old), those are not found even in the Oldest form of Tamil. The origin of Malayalam calendar dates back to year 825 CE. It is generally agreed that the Quilon Syrian copper plates of 849/850 CE is the available oldest inscription