Columbus Man-Tended Free Flyer
The Columbus Man-Tended Free Flyer (MTFF) was a European Space Agency (ESA) program to develop a space station that could be used for a variety of microgravity experiments while serving ESA's needs for an autonomous crewed space platform. It consisted of a Columbus module docked to a service module containing solar power collectors, communications and other services.
Source: Wikipedia — Columbus Man-Tended Free Flyer (CC BY-SA 4.0)