A periodic table of generalised Grassmannians, i.e. quotients G/P of a simple algebraic group by a maximal parabolic subgroup, covering Dynkin types A-D up to rank 7 together with E6, E7, E8, F4 and G2. Each entry records the dimension, Fano index, Euler characteristic and further data such as (co)minusculity, (co)adjointness, Hodge numbers and properties of the quantum cohomology.