context: Rock Mosque (, Qubbat As-Sakhrah,, Kipat Hasela) is an Islamic mosque on the Temple Mount in Jerusalem. The place is important to Muslims because according to tradition, the founder of Islam, Muhammad, ascended to heaven. The mosque was built between 687 and 691. [1] It is one of the earliest landmarks of Islamic architecture [2] and is considered the most famous landmark of Jerusalem. [3]
question: When was the Rock Mosque built?
answers.text: 687 and 691