Chairman of the Saudi General Authority for Tourism and Antiquities Prince Sultan bin Salman bin Abdul Aziz and Princess Astrid, representing King Philippe of Belgium, discussed Saturday areas of cooperation in the fields of investment, tourism, antiquities and heritage.Princess Astrid also met with the President of the Advisory Committee to the Saudi National Museum Princess Adila bent Abdullah bin Abdul Aziz.Princess Astrid arrived in Riyadh on Saturday, on a several-day visit, at the head of a high-level economic delegation.