Bahraini King Hamad bin Isa Al Khalifa received here today the participants in the conference on dialogue between civilizations and cultures, led by Al-Azhar Grand Imam Dr. Ahmed Al-Tayeb and Prince El-Hassan bin Talal. Themed "Civilizations in Service of Humanity", the three-day conference was opened today in Bahrain under the patronage of King Hamad bin Isa Al Khalifa. The King welcomed them all the delegations in Bahrain, thanking them for their participation in the key conference which promotes dialogue between civilizations and cultures.