Who is credited with building the old Chavadi where Amir Shakkar was ordered to stay?

According to the narrative in Chapter 22, the old and dilapidated Chavadi was built by a historical figure named Malik Ambar. The text mentions this detail while describing the miserable state of the building where Amir Shakkar was forced to reside for nine months as part of his 'treatment' for rheumatism. The age and decay of the structure, originally built by Malik Ambar, are emphasized to highlight the severity of the test Sai Baba had given to Amir.