I have inherited my great grandfathers Galaxie but it won't turn over. I've replaced the starter selonid and starter. When I turn the keys nothing happens at all. Lights interiorly work as do headlights. It drove last year when I had to put it in storage. Any other thoughts as to why this might be happening .

I've charged the battery fully and still absolutely nothing happens

 

It takes 300 times more to power to crank than to power up the lights, for diagnostic purposes you MUST fully charge your battery before you begin. Before doing so, get a voltmeter and measure the current voltage, what is it?
You said you replaced the starter and the solenoid (fender mount I assume), which exact solenoid, which brand which model and where you bought it from?
Ensure your battery is fully charged then:
Identify which is the M terminal of your fender mount relay, there should be a thick cable going to your starter, then identify which is the B terminal, this goes to your battery positive post.
1) voltmeter red to B terminal of your fender mount relay, black to battery negative post, what voltage you get? Is it the exact same voltage as measuring directly from battery posts?
2) voltmeter red to S terminal of your fender mount relay, black to battery negative post, find a helper to turn the key to START, what voltage you get? Is it non-zero?
3) If you get non-zero from step 2 above, then voltmeter red to M terminal of your fender mount relay, black to battery negative post, find a helper to turn the key to START, what voltage you get, is it zero?

Try to wait at least 3 minutes between each crank.