Here we discuss the synthesis and characterization of three novel bismuth oxo-chlorides ([Bi6Na0.5O7.5][Na0.5Cl3](channel)[Cl](layer); [Bi17PbO22][Cl-6](channel)[Cl-3](layer); [Bi-9(Pb0.2Mn0.8)O-12][Cl-3](channel) [Cl-2]layer) which all show an original multidimensional crystal structure. It is formed of two-dimensional (2D)-layered blocks separated by Cl- layers. The blocks are porous with triangular one-dimensional (1D)-Cl- channels with various section sizes. This multidimensional feature is unique in the field of Bi and Pb oxo-halides, while so far only ID or 2D halides units have been reported. The stability of the framework is allowed by Bi3+/Mn+ aliovalent substitution to balance charge neutrality. The channel and tunnel walls are formed by edge-sharing O(Bi,M)(4) oxocentered tetrahedra, while the triangular tunnel junctions are achieved by O(Bi,M)(5) pyramids. The three compounds are rather stable, but only [Bi6Na0.5O7.5][Na0.5Cl3](tunnel)[Cl](layer) was obtain as a single-phase material so that its photoluminecence properties have been investigated. It shows an unusual red bright luminescence with a maximum at 14150 cm(-1) at low temperatures due to transitions that are well explained by the Bi-Cl bonding scheme.