Qatari Diar is honored to be the Host Sponsor for the Sustainability Summit that was held from 27 Qatari Diar is honored to be the Host Sponsor for the Sustainability Summit that was held from 27 to 28 October 2019, under the patronage of H.E. Sheikh Abdullah Bin Nasser Bin Khalifa Al Thani, the Prime Minister and Minister of Interior of Qatar.​