Vientiane is the caipital an lairgest ceety o Laos, situatit in the Mekong River. Vientiane became the caipital in 1563 due tae fears o a Burmese invasion. Durin French rule, Vientiane wis the admeenistrative caipital an due tae economic growthe in recent times, it haes acome the economic centre o Laos.