The photo shows the Süleymaniye Mosque in Istanbul, Turkey. The mosque is beautifully lit up at night, and the phrase "Sevelim Sevilelim" is written in lights above it. The joke is that the phrase "Sevelim Sevilelim" (Let's love each other) is a common expression used to promote peace and harmony. However, it is ironic because the mosque is a place of worship, and the phrase is being used in a secular context. The joke plays on the juxtaposition of religious and secular themes, which is a common trope in Turkish humor. The joke is also relatable because many people in Turkey are familiar with this phrase and its use in different contexts. The photo is a playful way to point out this cultural quirk and make people smile.