Analysis of information sources in references of the Wikipedia article "Wali" in English language version.
QUBBA. The Arabic name for the tomb of a holy man ... A qubba is usually erected over the grave of a holy man identified variously as wali (saint), faki, or shaykh since, according to folk Islam, this is where his baraka [blessings] is believed to be strongest ...
The other site is the over 1,200-year-old tomb of Ghazi Abdullah Shah, a descendant of Imam Hasan. He has become a Wali of Karachi and his urs is an important event for the city and its inhabitants.