This link may just find itself on the main web page and World Anvil in the future if I find a nice place for them.
Retired sigils are not currently used by any players but I have left them there as a fun record of sorts.
If you are unsure if you are allowed to use a sigil in a post or not, you may ask.
(P.S. I am interested in collecting House Sigils and other In Character sigils if you want them added to the repository. Please send them to me directly at Marcella@knightrealms.com. I may put out an official call for House Sigils after our new House system is implemented!)