Question

I am the center of gravity hold a capital situation in Vienna and as I am foremost in every victory am allowed by all to be invaluable. Though I am invisible I am clearly seen in the midst of a river. I could name three who are in love with me and have three associates in vice. It is vain that you seek me for I have long been in heaven yet even now lie embalmed in the grave. What am I?

Answer

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