Rare picture of the four pillars of the Dilli Gharana

Shams-e-mosiqui Ustad Mamman Khan- the inventor of the instrument called Sursagar along with his brothers.
From left - Ustad Kallu Khan,Ustad Mamman Khan (carrying Sursagar), Ustad Samman Khan & Ustad Sugra Khan. This is the 6th generation of the current clan (as of 2015) of Dilli Gharana.