AP PHOTOS: A look at Mardi Gras festivities in New Orleans through the years

The Rex Organization , founded in the 19th century , rolls every Fat Tuesday .

The role of Rex , King of Carnival, filled each year by a different local dignitary.

Chilly temperatures and some strong winds were forecast for Tuesday 's rides.

The major carnival clubs — also known as krewes — typically culminate their rides with a black-tie affair.