How Rich Was Frankere?

How rich was frankere? How do it compare to anglo saxon, england? And how well defended was it? Generally speaking, the frankish realm was a very sort of affluent and there was lotsf of uplanded wealth. But these were all sights that were on the very edges of frankish influence. So they were remote, they were quite poorly defendedand they were hard to get any sort of reinforcements tovery quickly.