Astronomical Polarimetry: Current Status and Future Directions. ASPC 343
[en] A survey measuring quasar polarization vectors has been started in two regions towards the North and South Galactic Poles. Here, we review the discovery of significant correlations of orientations of polarization vectors over huge angular distances. We report new results including a larger sample of the quasars confirming the existence of coherent orientations at redshifts z>1.