The 1st User Workshop on Coherent X-ray Imaging and Small Angle X-ray Scattering (Cateretê Workshop) will be held at the LNLS, on May 5th and 6th, 2016.  The aim of this workshop is to present and discuss the science that could be conducted at the Coherent Diffractive Imaging beamline Cateretê, one of the first experimental stations to be operational in 2019 at Sirius, the new fourth generation synchrotron currently under construction.