  The nuclear modification factor, $R_{\rm AA}$, of the prompt charmed mesons
${\rm D^0}$, ${\rm D^+}$ and ${\rm D^{*+}}$, and their antiparticles, was
measured with the ALICE detector in Pb-Pb collisions at a centre-of-mass energy
$\sqrt{s_{\rm NN}} = 2.76$ TeV in two transverse momentum intervals, $5<p_{\rm
T}<8$ GeV/$c$ and $8<p_{\rm T}<16$ GeV/$c$, and in six collision centrality
classes. The $R_{\rm AA}$ shows a maximum suppression of a factor of 5-6 in the
10% most central collisions. The suppression and its centrality dependence are
compatible within uncertainties with those of charged pions. A comparison with
the $R_{\rm AA}$ of non-prompt ${\rm J}/\psi$ from B meson decays, measured by
the CMS Collaboration, hints at a larger suppression of D mesons in the most
central collisions.
