LT2021 m. rugpjūčio–rugsėjo mėnesiais atlikti detalieji tyrimai sklype Žygimantų g. 3, esančiame Jono Juozapo Tiškevičiaus rūmų aplinkoje, ir greta esančiame parke. Tirta vieta patenka į buvusią istorinę Radvilų rezidencijos Puškarnioje teritoriją. Tyrimų vieta nuo XV a. jau priklausė Radviloms ir įėjo į Lukiškių priemiesčio sudėtį. Nuo XVI a. teritorija aplink Šv. Jurgio bažnyčią ir karmelitų vienuolyną vadinta Puškarnia, nes joje nuo seno buvo liejamos patrankos ir gyveno įvairūs su tuo susiję amatininkai bei meistrai. Tuo metu į aplinkinę vietovę perkeltos karališkosios arklidės bei kiti didžiojo kunigaikščio dvarui priklausę ūkiniai pastatai. 1506 m. Švč. Mergelės Marijos Snieginės (Šv. Jurgio) bažnyčios ir karmelitų vienuolyno steigimo dokumentuose šioje vietoje minimas Jurgio Radvilos I dvaras. [...] [p. 217].
ENThe 2021 excavation (8 various-sized trenches totalling 355 m2) at Žygimantų St. 3, Vilnius, which is on the grounds of the Jonas Juozapas Tiškevičius Palace and in the adjacent park, which was once the historic grounds of the Radvila residence in Puškarnia, revealed a 16th – early 21st-century cultural layer, which was at least up to 0.6–1.4 m thick. The sunken structures identified in the sterile soil reached a depth of up to 1.7–1.9 m. It was determined that a richer cultural layer had formed in the parts of the area closer to Žygimantų Street and near the SE part of the Tiškevičius Palace. A surviving archaeological layer or its remnants was identified in Trenches 1–2 and 8. A storage pit uncovered in Trench 1 contained a fairly large quantity of ‘bowlshaped’ (Schüsselkacheln), panel (Blattkacheln), cornice (Gesimskacheln), and other stove tiles, which can be stylistically dated to the 16th century. Trench 5 contained another informative storage pit or part of an earlier layer that had been moved aside and also had a considerable quantity of 15th–16th-century stove tiles, nearly only ‘bowl-shaped’ or ‘pot-shaped’ (Topfkacheln) stove tiles, some with a square mouth (mit quadratische Mündung). Trenches 2, 4, and 7 likewise contained sunken structures, which, although yielding fewer finds, also date to the 16th–17th centuries. As was mentioned, the archaeological layer in the investigated area was probably removed in the 19th century, i.e., in connection with the construction of a building by Karabanovičius and its reconstruction into the Tiškevičius Palace.The masonry structures discovered in Trench 8 are building remnants representing several periods: the remains (brick paving) of an 18th – early 19th-century building and part of the arched foundation from the early 17th-century fence that surrounded the Radvila Palace, separating it from the nearby park and ponds that belonged to the family. In the first half of the 19th century, the remnants of the former buildings were demolished to a level that would not interfere with the construction of new palaces in the area.