Let G → P → M be a flat principal bundle over a compact and oriented manifold M of dimension m = 2d. We construct a map of Lie algebras Ψ :, where H S 1 2 * (LM ) is the even dimensional part of the equivariant homology of LM , the free loop space of M , and MC is the Maurer-Cartan moduli space of the graded differential Lie algebra Ω * (M, adP ), the differential forms with values in the associated adjoint bundle of P . For a 2-dimensional manifold M , our Lie algebra map reduces to that constructed by Goldman in [Go2]. We treat different Lie algebra structures on H S 1 2 * (LM ) depending on the choice of the linear reductive Lie group G in our discussion. This paper provides a mathematician-friendly formulation and proof of the main result of [CFP] for G = GL(n, C) and GL(n, R) together with its natural generalization to other reductive Lie groups.Contents 24 Appendix B. Parallel transport and iterated integrals 25 References 27