As a means of recording the passage of time, the 12th century was that century which lasted from 1101 to 1200. In the history of European culture, this period is considered part of the High Middle Ages.
Proto-Tamil Malayalam, the common stock of Tamil and Malayalam apparently disintegrated over a period of four of five centuries from the ninth century on, resulting in the emergence of Malayalam as a language distinct from Tamil.
Malayalam poetry to the late twentieth century betrays varying degrees of the fusion of the three different strands.
The oldest examples of /pattu/ and maniprvAlam respectively are /rAmacharitam/ and /vaishikatantram/, both of the twelvethcentury.
In the 12 century the Muslim mystics, known as Sufis, were primarily responsible for spreading Islam to India, China, Central Asia, Turkey, and sub-Saharan Africa.
Islamic traders were responsible (by the 14th century) for extending Islam to Indonesia, Malaya, and China.
Six collections of the Hadith (a collection of the sayings of Muhammad) compiled in the 3rd century AH (9th century AD) are regarded as especially authoritative by the Sunni Muslims; whereas Shi'ah Muslims have a different set of sayings in their Hadith.