Abdullah bin Jassim Al Thani eldest son, Sheikh Ali bin Abdullah Al Thani. Oil was also discovered for the first time during his rule. Sheikh Abdullah bin Jassim Al Thani was born in the year 1880, in Doha, the capital city and state of Qatar, by his father, Sheikh Jassim bin Mohammed Al Thani. Although his mother is still unknown, he was born along with his eighteen siblings, with him being the 5th eldest among his siblings. He then ruled Qatar until 1940. Sheikh Abdullah's heir apparent, Sheikh Hamad bin Abdullah Al Thani, ruled Qatar from 1940 until his early death in 1948. Sheikh Abdullah
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