Nikolay Tcholtchev, scientist at SQC, held a one-hour tutorial on the topic of reference architectures for ICT in Smart Cities. The lecture focused on standardization activities at both national and EU level. The presented reference architectures support the interoperability between components, modules, layers and general artefacts of ICT ecosystems for smart cities. Moreover, the application of such an ICT reference architecture in a series of European cities was the content of the tutorial.