The spectacular royal tomb "Ulaankhermiin Shoroon Bumbagar" was discovered in Bulgan province, Mongolia, in 2011. Excavation of the site revealed its internal structure; a slope of 42 meters in length leading down to the underground mausoleum at a depth of 7 m below the ground. Archaeological investigations provided the site with an independent age control suggesting the construction date of the Royal tomb to the last quarter of the VII century. In this study, we directly date different materials from the site, such as terracotta figurines, mortar and host sediment, using infrared-stimulated (IR 50) and postinfrared infrared stimulated (pIRIR) luminescence techniques. The most accurate estimate of 670^70AD and 550^110AD was obtained for terracotta figurines using IR 50 and pIRIR on aliquots of 4-11 mm polymineral grains. By comparison, sand-sized quartz single grain measurements on the embedded sediment yielded normal equivalent dose (D e) distributions with a few outliers, justifying the use of the central age model (CAM) for age calculation, and yielded construction dating to the 780^140AD. Finally, sand-sized quartz single grain measurements on wall mortar revealed incomplete bleaching of grains, requiring detailed analysis using statistical approaches; from this we identified the most well bleached population age of 740^130AD, using the lowest 5%. The luminescence ages are in general agreement with the historically expected age. Statement of significance The archaeological site at Ulaankhermiin Shoroon Bumbagar, Mongolia (with an independent age control) offers a great opportunity to apply luminescence dating methods, such as pIRIR on 4-11 mm polymineral fine grains, and single grain measurements on 200-250 mm quartz grains, to various materials, such as terracotta figurines, mortar-like limestone which covered the walls and embedded sediment in order to test the accuracy of optically stimulated luminescence (OSL) dating techniques. Compared to all other datable archaeological materials, mortar has the advantage of being intentionally manufactured at each stage of construction, since it cannot be recycled. However, dating of the well bleached grains of mortar, which provided the greatest challenge in this study, was achieved using the lowest 5% estimate, yielding an age of 740^130AD. pIRIR on heated polymineral (feldspar-bearing) fine grain aliquots from terracotta figurines was tested, yielding IR 50 and pIRIR 180 dates in agreement with the CAM estimate from the host sediment.