  Gamma-ray emitting blazars have been the targets of many recent or ongoing
monitoring programmes. The resulting multi-wavelength data archives are ideal
for studying the quiescent and variable behaviour of the blazar PKS 2155-304.
Here, observations of the optical polarization of the source between 2009 and
2014 (> 5 years) are presented, together with overlapping radio, photometric
and gamma-ray measurements. During this time the source displayed significant
variability at all wavelengths, with several prominent flares seen for the
optical and gamma-ray intensity. These flares are typically associated with
large rotations (>80{\deg}) in the polarization angle, during which the
polarization angle appears to be oriented parallel to the position angle of the
spatially resolved radio jet. Our aim is to determine if these large
polarization angle rotations are correlated to the multi-wavelength outbursts
seen in PKS 2155-304 in order to examine how changes in the polarization angle
(and its orientation relative to the jet) relate to changes in the spectral
energy distribution of the source.
