Survival of the Obscuring Torus in the Most Powerful Active Galactic Nuclei

S.M. acknowledges financial support through grant AYA2016-76730-P. (MINECO/FEDER). F.J.C., X.B., and A.A.-H. acknowledge financial support through grant AYA2015-64346-C2-1-P (MINECO/FEDER). A.H.-C. acknowledges financial support through grants AYA2015-70815-ERC and AYA2012-31277. C.R.A. acknowledges financial support through grant AYA2016-76682-C3-2-P and the Ramon y Cajal Program through project RYC-2014-15779 (MINECO). T.M. is supported by CONACyT Grants 179662, 252531 and UNAM-DGAPA PAPIIT IN104216. Based on observations collected at the European Organization for Astronomical Research in the Southern hemisphere, Chile. Based on observations made with the William Herschel Telescope-operated by the Isaac Newton Group, the Telescopio Nazionale Galileo-operated by the Centro Galileo Galilei, and the Gran Telescopio Canarias installed in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias.