  In the planar N = 4 supersymmetric Yang-Mills theory at weak coupling, we
perform the first analytic computation of a two-loop eight-edged Wilson loop
embedded into the boundary of AdS3. Its remainder function is given as a
function of uniform transcendental weight four in terms of a constant plus a
product of four logarithms. We compare to the strong-coupling result, and test
a conjecture on the universality of the remainder function proposed in the
literature.
