Item Open Access14th AESOP Head of Schools Meeting in 2019(Association of European Schools of Planning, 2019) AESOPThe 14th AESOP Head of Schools meeting in 2019 will be hosted by University of Ljubljana (UL), jointly by the Faculty of Civil and Geodetic Engineering and Biotechnical Faculty. The date coincides with the 100th anniversary of the UL, and the topic of ‘Planning and the Disciplinarity Question’ was chosen to celebrate the contribution of planning disciplines to the challenges of transition of the academia towards ‘Xdisciplinarity’. The notions of single-, multi-, trans- and interdisciplinarity (jointly referred to as Xdisciplinarity) have been introduced over the past decades and has been addressed by AESOP at numerous occasions and various outlets. However, due to the changing nature of issues planning is facint, the topic continues to be relevant at various levels, including the input of applied knowledge into planning education. In practice, Xdisciplinarity requires both a good understanding of the planning discipline and of other disciplines it interacts with; and skills and competencies for collaborating with different professionals. These requirements are translated to planning programs. The question is what kind of Xdisciplinary knowledge makes students sufficiently equipped to tackle contemporary and upcoming urban challenges and what are the implications for the planning curricula. In addition, it is important to consider the roles of the planning practice, the market needs, and the academia in shaping these curricula. Therefore, this 14th meeting of the heads of AESOP institutional members is taking on the perennial theme of Xdisciplinarity with an intention to grasp the shifting meaning and scope of it for planning education. The program will include five sessions, two plenaries and three break-out session.