This city is one of innumerable domed cities that dot the globe built to allegedly shield humanity form some disaster. Anvard is the setting for a fair amount of the story of Finder stories.
Carnival is a regular festival at the city as the sun is hidden form the city shield it powers, causing it to blink on and off and signal the start of Carnival.
Several forms of slavery are legal in Anvard.
It seems to be named after the castle found in C. S. Lewis Narnia.