  Using D$^{*+}$ mesons exclusively reconstructed in the DELPHI detector at
LEP, orbital and radial excitations of non strange charmed mesons are studied.
The multiplicities of the two narrow $D^0_1$ and $D^{*0}_2$ orbital excitations
are measured in $Z^0 \to c \bar c$ and $Z^0 \to b \bar b$ decays. Preliminary
results are obtained on the production of broad D$^{**}$ states, using B meson
semi-leptonic decays. A narrow signal of 66 $\pm$ 14 events is observed in the
$(D^{*+} \pi^+ \pi^-)$ final state, interpreted as the first evidence of the
predicted $D^{*'}$ radial excitation.
