Explanation

In the sentence "Quaid-e-Azam lived at Ziarat Residency," the preposition "at" is used to indicate a specific location or place where someone lives or stays.

It's commonly used when referring to a residence or a particular address.

In this context, "at" is used to specify that Ziarat Residency was the place where Quaid-e-Azam resided during a specific period of time.