An Historical Community

I was watching TV last night, when on the coffee table I noticed one of my daughters paperback books regarding Colonial Williamsburg.

Now I'm no english wiz, in fact, I almost flunked my senior year on account of english, but I noticed that "An Historical Community" just didn't seem to roll of my tongue like most other phrases do.

Shouldn't it be "A Historical Community"?

I always thought you don't use an "an" unless the next word starts with a vowel.

A paper cutter
A computer
A Type writer
A Record Player

An apple
An everlasting project
An interesting question
An old man
An unbrella

I'm like you. "An" sounds weird before a word beginning with H... however it has become "the norm" to use "an" rather than "a" before the word History, historical, etc.