<Li> <P> Zamzam well located beneath floor (entrance now covered) </P> </Li> <P> Zamzam well located beneath floor (entrance now covered) </P> <P> There has been some controversy that the expansion projects of the mosque and Mecca itself are causing harm to early Islamic heritage . Many ancient buildings, some more than a thousand years old, have been demolished to make room for the expansion . Some examples are: </P> <Ul> <Li> Bayt Al - Mawlid, the house where Muhammad was born, was demolished and rebuilt as a library . </Li> <Li> Dar Al - Arqam, the first Islamic school where Muhammad taught, was flattened to lay marble tiles . </Li> <Li> The house of Abu Jahal has been demolished and replaced by public washrooms . </Li> <Li> A dome that served as a canopy over the Well of Zamzam was demolished . </Li> <Li> Some Ottoman porticos at the Masjid al - Haram were demolished, and those remaining are under threat . </Li> </Ul>

What is the size of masjid al haram