I'm guessing this has probably already been asked and if so I'm sorry for making another topic asking about it , In Whiterun on the right hand side of doors that lead inside the shops and houses there are some round symbols , some look like a ladder inside a circle and others look slightly different , what are the meaning of these symbols or is it just some random decoration? as you can probably guess I'm not very far into the game due to having to restart twice due to game breaking glitches but I'd still like an answer if possible , thanks in advance for any help

they are signs meant for thieves guild members. But I haven't found anything in game that actually describes their use in detail.

http://www.uesp.net/wiki/Skyrim:Shadowmarks

Its a book found in the Ragged Flagon

heh heh i just read that XD (in game)

Then welcome to the Guild...