PLISKA (Stanislav Ivanov – stanislavivanovarh@gmail.com) A stove constructed of stone and bricks and a storage pit were discovered in House No. 9 dated to the second half of the 10th – beginning of the 11th centuries. The explorations of the well (Pit No. 18) continued down to 11.25 m in depth. Six human skulls and bones were discovered at 7.20 – 7.30 in depth. Byzantine bronze coins were found in the filling of the well: three anonymous folles of the Class B (AD 1030/1035 – 1042), one anonymous follis of the Class A2 (AD 976 – 1030/1035), while the earliest follis found in the well belonged to Constantine VII Porphyrogennetos and was minted in Constantinople in AD 945 – 950. Therefore, from the second half of the 10th century onwards the well was not functional and was gradually filled up. The cemetery at the Palatial Basilica appeared during the second half of the 9th century and existed until the middle of the 11th century. Seven burials were explored belonging to six adults and one child. Grave No. 51 was covered with marble slabs. The extension of the so-called Wide Secret Underground Passage from the period when Pliska was the capital of the First Bulgarian Kingdom was documented in Trench 97–M. Postholes and trenches from timber buildings were discovered.