The Safed Baradari of Awadh is known for its architectural beauty showcasing fine craftsmanship from mediaeval India. This study explores the effect of airborne particulate matter on the white lime plaster facades of the Safed Baradari through Computational Fluid Dynamical modelling, Tunnelling Electron Microscopy and Electron Diffraction studies. Vehicular pollution is identified as the primary source for the high airborne particulate matter concentrations and has been modelled as a line source, representing a dominant thoroughfare in its vicinity. In order to establish the morphology and nature of the particulate matter deposited on the white façade, lime plaster samples from the building were subjected to TEM (Transmission Electron Microscope) and EDX (Energy Dispersive X-Ray) — ultrafine carbonaceous particles were found to be studded onto the calcium carbonate crystals of the lime plaster. In order to remedy the effect of such deposits, it is suggested that carefully crafted organic drapes with prescribed porosity and thermal properties are placed at vantage points to intercept this wind-driven pollution.