If you can link me to some examples, I can be of more help.

You could also think of Victorian style, maybe turned up a bit.

If you want to reflect architectural lettering, any good Roman majuscules will probably do the job—Trajan and Big Caslon are both very similar to lettering on the two great beaux-arts buildings here in Washington.

Take a look at Font Bureau's Meyer Two and see if it suits your needs at all. It's 1920s/30s period without being geometric Deco.

http://www.fontbureau.com/fonts/MeyerTwo

-- K.

Thank you. All the suggestions were very helpful.