This may be too recent to be trivia, but in the original Dragonlance (and the 2E version, IIRC) characters could only advance up to 18th level, after that they were retirned (again IIRC, they were retired by the deities removing them from Krynn, since they'd become too powerful).
Another bit of DL info: a lot of people in 1E complained that they didn't like how the gods (from the 1E D&Dg) had hit points, to which TSR always responded that those stats were for the avatars, not the gods themselves. But in th Dragonlance Adventures book, the stats given really were for the deities themselves! Paladin had about a thousand hit points or so, just about a hundred more than Takhisis.
In the World of Krynn supplement, there was an adventure where you had to enter Dargaard Keep and confront Lord Soth. One of the monsters you could encounter in the Keep was the Tarrasque!