  A search for a narrow-width resonance decaying into two Higgs bosons, each
decaying into a bottom quark-antiquark pair, is presented. The search is
performed using proton-proton collision data corresponding to an integrated
luminosity of 35.9 fb$^{-1}$ at $\sqrt{s}=$ 13 TeV recorded by the CMS detector
at the LHC. No evidence for such a signal is observed. Upper limits are set on
the product of the production cross section for the resonance and the branching
fraction for the selected decay mode in the resonance mass range from 260 to
1200 GeV.
