Until recently, apart from the Serapaeum, very little of Ptolemaic Alexandria could be seen. However, since 1994, Professor Jean-Yves Empereur and his team have been uncovering the remains of the ancient city. A team of underwater archaeologists has been exploring the sea bed off Qaitbay Fort and has discovered thousands of columns, bases and capitals, many of red granite, removed from buildings of the Ramesside Period and reused by the Ptolemies. Parts of six colossal statues have been recovered, including a head of one of the Ptolemies. Other discoveries include obelisks, sphinxes and an enormous statue of a queen as the goddess Isis.