Qatar population was 2.6 million: 313,000 Qatari citizens and 2.3 million expatriates. Islam is the official religion of Qatar. The country has the highest per capita income in the world. Qatar is classified by the UN as a country of very high human development and is widely regarded as the most advanced Arab state for human development. Qatar is a high-income economy, backed by the world's third-largest natural gas reserves and oil reserves. Qatar has been ruled by the House of Thani since Mohammed bin Thani signed a treaty with the British in 1868 that recognised its separate status. Following Ottoman
Collecting practices of the Al-Thani Family prominent buyer on the art market, the Al-Thani family has significantly expanded its modern art collection. The family owns notably: In addition to building collections of works by international artists, the Al-Thani family is committed to developing Arab contemporary art and supporting regional artists. The credit goes in the first place to Sheikh Hassan bin Mohamed bin Ali Al Thani, who began buying Arab art in the mid-1980s while very little attention had been carried out on the region's artistic movements. In 1986, he started collaborating with the artist and art educator Yousef Ahmad. Hassan Al-Thani supported Iraqi artists after