Masjid Al Aqsa, what is Masjid Al Aqsa, Who built Masjid Al Aqsa.

Masjid Al Aqsa, the third most sacred site for Muslims. This video answers basic questions about Masjid Al Aqsa located in Jerusalem.
What Masjid Al- Aqsa?
Why is Masjid Al-Aqsa important in Islam?
Who Built Masjid Al-Aqsa?