Elminster is perhaps
the most famous person on Toril, and certainly the most eminent sage
in Faerūn. Nobody knows exactly how old this powerful and wise
wizard is, but he seems to have been around for several hundreds of
years. He currently resides in the village of Shadowdale.
Elminster was one of the first imaginary persons Ed Greenwood
created for the Forgotten Realms. Bits of information about him can
be found in virtually all game products, but the Elminster novels by
Ed Greenwood are perhaps the most intriguing sources of information
(i.e. Elminster: The Making of a Mage, Elminster in Myth Drannor,
and The Temptation of Elminster). The Shadow of the Avatar
Trilogy by Ed Greenwood is also recommended -- but don't forget
to read at least The Avatar Trilogy first.