Saudi Arabia's Prince Alwaleed bin Talal Attends Charity in the Saudi capital, Riyadh on July 1, 2015.

Saudi Arabia's billionaire Prince Alwaleed bin Talal speaks to reporters during a press conference in the Saudi capital, Riyadh, on July 1, 2015. Alwaleed pledged his entire $32-billion (28.8-billion-euro) fortune to charitable projects over the coming years. The prince said in a statement that the 'philanthropic pledge will help build bridges to foster cultural understanding, develop communities, empower women, enable youth, provide vital disaster relief and create a more tolerant and accepting world.'

Saudi Arabia's billionaire Prince Alwaleed bin Talal gives a press conference in the Saudi capital, Riyadh, on July 1, 2015. Alwaleed pledged his entire $32-billion (28.8-billion-euro) fortune to charitable projects over the coming years.

Saudi Arabia's billionaire Prince Alwaleed bin Talal gestures during a press conference in the Saudi capital, Riyadh, on July 1, 2015

Saudi Arabia's billionaire Prince Alwaleed bin Talal arrives to give a press conference in the Saudi capital, Riyadh, on July 1, 2015.

Saudi Arabia's billionaire Prince Alwaleed bin Talal gestures during a press conference in the Saudi capital, Riyadh, on July 1, 2015. Alwaleed pledged his entire $32-billion (28.8-billion-euro) fortune to charitable projects over the coming years.

Prince Khaled Alwaleed bin Talal, the son of Saudi Arabia's billionaire Prince Alwaleed bin Talal, looks on as his father speaks during a press conference in the Saudi capital, Riyadh, on July 1, 2015.

Princess Reem Alwaleed bin Talal, the daughter of Saudi Arabia's billionaire Prince Alwaleed bin Talal, looks on as her father speaks during a press conference in the Saudi capital, Riyadh, on July 1, 2015. Alwaleed pledged his entire $32-billion (28.8-billion-euro) fortune to charitable projects over the coming years.

Princess Reem Alwaleed bin Talal, the daughter of Saudi Arabia's billionaire Prince Alwaleed bin Talal, looks on as her father speaks during a press conference in the Saudi capital, Riyadh, on July 1, 2015.

Saudi Arabia's billionaire Prince Alwaleed bin Talal (L) speaks with his media advisor Heba Fatani during a press conference in the Saudi capital, Riyadh, on July 1, 2015.

Saudi Arabia's billionaire Prince Alwaleed bin Talal (L) speaks with his media advisor Heba Fatani during a press conference in the Saudi capital, Riyadh, on July 1, 2015.