The open data portal of Debrecen set off with publishing four data sets: large resolution digital photos on the city, the time tables of arriving and departing flights from Debrecen, demographic data including age and gender distribution from 2013 and visitor statistics from the local swimming pool's last year. The purpose and method of reusing these data is open for users and businesses, and the city welcomes feedback and ideas about further datasets that could be interesting or important to publish.