The planning and execution of joint transnational calls for proposals is like high level Origami. Every single bit and piece has to fold into its perfect position, getting more complex the more partner countries or funding bodies participate. The ERA-NET NEURON created a strategically operating group of research funding organisations in Europe and beyond to implement research funding programmes in the area of to brain diseases. The organisations are in their countries key players concerning neuroscience research funding and invest considerable funding volumes in this research area. Since 2008 NEURON conducted four joint transnational calls in a coordinated manner.