  This paper deals with static BPS monopoles in three dimensions which are
periodic either in one direction (monopole chains) or two directions (monopole
sheets). The Nahm construction of the simplest monopole chain is implemented
numerically, and the resulting family of solutions described. For monopole
sheets, the Nahm transform in the U(1) case is computed explicitly, and this
leads to a description of the SU(2) monopole sheet which arises as a
deformation of the embedded U(1) solution.
