Hilbert's circle of physicists consists of his students M. Born, P.
Jordan, W. Heisenberg, J. v.
Neumann, P. Debeye, P.
Dirac, H. Weyl, J.
Franck, W. Pauli, L.
Prandtl, K. Schwarzschild.
We present their biographies, the links of a couple of them with the development of quantum physics and their memories of Hilbert's lectures.