  Singular gauge fields in the partition function for QCD can lead to a
domain-like picture for the QCD vacuum by virtue of constraints on quantum
fluctuations at the singularities. With a simple model of hyperspherical
domains with interiors of constant field strength we show that the main
features of gluon condensation and an area law for static quarks can be
realised.The Dirac operator in such a background is exactly soluble. Chirality
properties of the solutions show agreement with recent lattice results.
