The globular cluster system of NGC 4365

This thesis investigates the formation of the galaxy NGC 4365, through the lens of its globular cluster system. Globular clusters are dense clusters of stars, almost as old as the universe and bright enough to be seen in other galaxies. The properties' of representative samples of the roughly 6500 globular clusters in NGC 4365 confirm the existence of a, possibly unique, additional group within the globular cluster population. This, combined with the study of globular clusters between NGC 4365 and a nearby galaxy, suggests that NGC 4365 formed in two stages with the first stage split into another two parts.