Abstract: The wall flora (especially plants growing on the Walls of the walls of the historical buildings) of Sanliurfa has been presented in this study. It was undertaken with the aim to determine the taxa growing on the walls of historical building of Sanliurfa and make contribution to the flora of Sanliurfa. This study flora and vegetation of stony walls (wall tops, vertical wall surfaces) in South-easth Turkey. In total, 113 species of vascular plants were recordedreleves. Flora of walls is composed of a high number of accidental species. Only four species (Hyoscyamus niger, Hordeum spontaneum, Capparis ovata and Brassica alba) were frequently recorded on walls. Differences in species` features (life strategy, life form, dispersal) and ecological requirements of plants (light, moisture) were analysed between vertical wall surfaces and wall tops. Their structure, species composition, ecology and distribution are briefly discussed.