The Citadel is an archive of information for George R.R. Martin's A Song of Ice and Fire.
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I might as well add that it looks like GRRM has a good bit left to write. He is still suggesting that he might add other POVs from aFfC into aDwD but it still depends on how big aDwD will be without these chapters. Since he isn't sure as of now, he clearly has a good few chapters to write. He is currently on the prologue. He is apparently finding it difficult to get right and has made several attempts at it already.
Parris did say that the renovations are done now and they just have to move back in everything. So things are better on that front. She also said that he is anxious to get back into aDwD when they return from Comicon but I know some people will never believe those declarations.
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