This chapter aims to present an overview of the field of digital museums and describes the current framework of content management systems feasibly integrated in the museums in 3D virtual environment for assisting visitors to deal with information overload and providing personalized recommendations, content, and services to them. Digital museums in 3D virtual environment are an intriguing alternative to let visitors experience them compared to thousands of existing digital museums that are similar to digital archiving places published in the Internet. Exemplary characteristics of digital museums in Web 1.0, Web 2.0, and Second Life are also reviewed and discussed. Moreover, prior classification of visiting styles essential to personalize the museum context and content is described in this chapter.