Historical signs were used then as they are used today - to advertise and encourage people to enter commercial establishments. There have been many types, and, like archeological layers, reveal a particular time period of occupancy and use.
Whether a wall sign, a blade sign, on a window or on a door, some signs are not allowed in every zoning district.
The Sign Code and Permits pamphlet will give you an overview of key information and requirements for signs in downtown Astoria.
Visit the City of Astoria website, or download the sign permit and sandwich board applications.