The Twentieth Century Society

Campaigning for outstanding buildings

Member's Area

Welcome to the Twentieth Century Society Members' Area

You are now in the online C20 Members' area, where you will be able to book current events and renew your C20 membership.

You are not currently logged in – click here to sign in.

If you are a C20 member but do not have a username or password yet, click here to register.
If you have forgotten your login details, please click here to request them.

You can still access our event booking pages without logging in.

If you have any problems using our website please email us at