Lately, indoor navigation systems has been a hot topic for the research community with many different proposals to positioning people and keeping track of their movements. In this paper we go a step beyond designing an object-oriented distributed architecture for highly scalable indoor navigation systems. The idea behind this architecture is to provide assistance for people with different needs while they stay in large spaces or buildings such as public administration buildings, transport facilities, hospitals and so on, helping them in the tasks to be performed in such environments.