Ryszard Kaja poster of Słupsk, depicting him and his life partner, Leszek, and dedicated to the latter. Słupsk was chosen specifically because it was first city with an openly gay mayor, Robert Biedroń, one of co-founders of Kampania Przeciw Homofobii.
Kaja is well known for his posters, including a series of ones depicting Polish towns and landmarks, of which the above poster is part of. He sadly passed away in 2019, aged 57. I highly recommend looking up his work.