Emergence of complexity can be found in various fields. We might take a crystal as an example: atom units are arranged in an ordered whereupon a pattern is formed. The structure is characteristic for the crystal as a whole and is responsible for particular features of the compound. From simple units a complex whole is built. As a part of our human practice project we are investigating in the role of complexity in fields outside our own. What is complexity for a philosopher? Are feelings always complex? How would a city planner describe emergence of complexity? What is the best way to approach complexity in nanophysics? Discussing comparable questions with experts of various professional fields allows us to see complexity from different angles. This gives us new, interdisciplinary and inspiring inputs.