Who is known as first mart yard of Karbala ?

Who is known as first mart yard of Karbala ?

کربلا کا پہلا صحن کس کو کہا جاتا ہے؟
Explanation

When did Karbala take place?
The Battle of Karbala took place on
Muharram 10, in the year 61 of the Islamic calendar (October 10, 680) in Karbala, in present day Iraq. On one side were supporters and relatives of Muhammad's grandson Husain ibn Ali, on the other side was a military detachment from the forces of Yazid I, the Umayyad caliph.