that the Residence Skretiska was the preferred place of residence of Constantine the Great during his visits to Serdica and that it originated as an imperial residence, among which is that the years of its construction coincide with the beginning of his long stays in Serdica, and his famous phrase "Serdica is my Rome!" is well known. Among the materials from the end of the 3rd - beginning of the 4th century, discovered during the archeological research in 1973 - 1978 under the direction of arch. Violeta Bozhilova paleoornithologist Prof. Zlatozar Boev has found a well-preserved skull of a Great white pelican Pelecanus onocrotalus. Probably the residence was maintained by the governor of the province of Serdica. It is also possible that the palatium / praetorium Scretisca was used by the bishops-delegates of the Council of Serdica (343). The main architectural complex of the residence - palatium Scretisca, is one of the most impressive examples of representative late Roman residential architecture (141/110 m) - the most remarkable country residence in the province of Inner Dacia or Mediterranean Dacia (Inner Dacia or Dacia Mediterranea) in hinterland of its capital Serdica and the largest, among the known peristyle residential complexes from the Antiquity of the Balkans with a large hall (aula), dining room (triclinum) with a complicated, probably triconch plan, numerous living quarters (cubicula), bathhouse ( balneum), a huge yard (peristylium) with an area of 4.5 decares, with a garden (hortus) and monumental entrances. The total area of the floor mosaics found in the northern peristyle exceeds 1000 m², and the total length of the peristyle and the outer southern portico is more than 400 m. The residence is the core of an impressive villa complex and the center of an impressive mansion (fundus dominium). A round plan (diameter 32 m), tentatively called "Rotunda" (Bozhilova / Vitski, 1985), probably with memorial or cult functions, located 100 m south of the residence, as well as a necropolis, were also studied. A strong ubiquitous fire destroyed the residence, which coincided with the time for which, according to written sources, during the Hun invasions in the 1940s, Serdica was also damaged. The road station Sretisca ("Mutatio per / ad Scretisca") - "for the residence" is located 1000 m south of the residence, it was probably built for its service with the main purpose taberna - inn with several rooms and a courtyard. Scretisca is mentioned