When Imperial College London was founded in 1907, it was through the merger of a number of smaller scientific & engineering teaching institutions. When these institutions merged into one College, their students' unions also merged - becoming Imperial College Union.
The division between the different schools, and their different areas of research and teaching, lives on in the College as the Faculties, and in the Union as the 'Constituent Unions'. There are six Constituent Unions.
While still being integral parts of the Union, Constituent Unions each have their own President, their own executives, and manage their own clubs and societies. They work closely with their respective Faculties within College.
City & Guilds College Union
Representing undergraduate students in the Faculty of Engineering, except those in the Department of Materials and the Department of Earth Science & Engineering
Graduate Students' Union
Representing taught and research postgraduates across College
Imperial College School of Medicine Students' Union
Representing undergraduate students in the Faculty of Medicine
Royal College of Science Union
Representing undergraduate students in the Faculty of Natural Science
Royal School of Mines
Representing undergraduate students in the Department of Materials and the Department of Earth Science & Engineering
Silwood Park Students' Union
Representing students based primarily at Silwood Park Campus