In 1994, the Pittsburgh Zoo became a private nonprofit organization, still owned by the City of Pittsburgh, but managed and operated by the Zoological Society of Pittsburgh. That same year, the Education Complex was built. This new building contained five classrooms, a library, and a 300-seat lecture hall. The construction of this building was an important part of the zoo's history because it signified the zoo's dedication to conservation and education. In 2000, the AquaZoo underwent a $17.4 million renovation, and was renamed the PPG Aquarium. This new aquarium is twice the size of the original AquaZoo. In 2002, the Education Complex was expanded to include a second story, providing more classrooms, teacher resource areas, and an animal holding area. This expansion was made possible by the Scaife Charitable Foundation and by donations from senator Rick Santorum.