By an overring of an integral
domain A we mean a ring which contains A and is contained in the quotient field of
A. We consider the following question. If D is a Krull overring of an affine ring A is
D necessarily Noetherian? Our main result is an affirmative answer to this
question when A is a normal affine ring of dimension two defined over a field or
pseudogeometric Dedekind domain such that each localization of A has torsion class
group.