Modern organizations need tools that support coordinated access to data stored in distributed, heterogeneous, autonomous data repositories.Database systems have proven highly successful in managing information. In the area of information integration multidatabase systems have been proposed as a solution to the integration problem.A multidatabase system is a system that allows users to access several different autonomous information sources. These sources may be of a very varying nature. They can use different data models or query languages. A multidatabase system should hide these differences and provide a homogeneous interface to its users by means of multidatabase views.Multidatabase views require the query language to be extended with multidatabase queries, i.e. queries spanning multiple information sources allowing information from the different sources to be combined and automatically processed by the system.In this thesis we present the integration problem and study it in an object-oriented setting. Related work in the area of multidatabase systems and object views is reviewed. We show how multidatabase queries and object views can be used to attack the integration problem. An implementation strategy is described, presenting the main difficulties encountered during our work. A presentation of a multidatabase system architecture is also given.