Report prepared in 1986. Four comets were discovered at the Royal Observatory of Belgium in 14 years, including the unforgettable Arend Roland comet. A true fairy tale for an astronomer that brought fame to the Royal Observatory of Belgium. However, the venerable institute, which was founded in 1824 on the initiative of the astronomer and mathematician Adolphe Quetelet, had long since initiated a tradition of research and observation that continues to this day. The ORB has become the world center for sunspot observation and one of the stations for receiving and processing messages from navigation satellites. The Royal Observatory of Belgium also participates in a global earthquake monitoring network and helps other countries pinpoint the epicenter of their earthquakes. But so many glorious activities should not lead to illusions. Despite the value of its researchers, the institution, like others, suffers from a shortage of staff, which hampers the performance of its diverse functions. In addition to its scientific activities, the Royal Observatory of Belgium also carries out educational tasks. For example, it manages a remarkable library containing original editions of the works of great geographers, astronomers and mathematicians.