University of Lisbon
It is known that, in 2002, the Council of Rectors of Portuguese Universities emitted the opinion that ISCTE should integrate the University of Lisbon (1911-2013), and in 2012, the University of Lisbon (before the merger with the Technical University of Lisbon) invited ISCTE to become a part of the bigger University, but ISCTE turned down both invitations.