Auction House in Neverwinter

This is probably a stupid question; I'm finding answers all over google but nothing telling me this though:

Where is the auction house?

I find links on the economy, how to make a fortune with astral diamonds, how to buy/sell... but I cannot find the bloody place in the game. Any help would be appreciated. (Note: I'm level 15; I got to the 20's a few years back but quit playing and started over. So I have access to the basic areas. I'm f2p, if that matters.)