CAIRO, July 12 (Xinhua) -- Several archaeological rooms that date back to the Roman and Byzantine eras were uncovered in the northern coast city of Alexandria, Egyptian Ministry of Antiquities said on Thursday.

The walls of the Romanian rooms comprise stone blocks at the right angles with remains, and one of the chambers has marble columns carved smoothly in Roman-style, said Moustafa Waziri, secretary general of the Supreme Council of Antiquities, in a statement.

The rooms with Byzantine walls contain stones of irregular sizes and the chambers were uncovered during excavation activities carried out in Mitt Abu Al-Kom at Marya site in Alexandria, the statement said.

The number of lamps decorated with crosses and palm leaves, along with dishes and water jars, were also unearthed during the excavation operation, it added.

Egypt has witnessed several big archeological discoveries over the last years in different parts of the country, including Pharaonic tombs, statues, coffins and mummies.