Abdullah bin Jassim Al Thani became the ruler of Qatar once again until 1949, when he abdicated in favour of his eldest son. Sheikh Ali bin Abdullah Al Thani, his eldest son, then ruled Qatar after his father's abdication. Although Sheikh Abdullah's first wife is Sheikha Maryam bint Abdullah Al Attiyah, he further married a second wife named Sheikha Fatima bint Isa Al Thani, daughter of Sheikh Isa bin Thamer Al Thani, to whom he bore his third son, Sheikh Hassan bin Abdullah Al Thani. In total, Sheikh Abdullah bin Jassim Al Thani had three sons: Sheikh Abdullah bin Jassim Al Thani died on 25
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