In point of fact, if you look at the basic ordering of the church, what you will find is an extremely familiar arrangement: A forecourt with a well in front, followed by the narthex and then in the church proper a triple nave lined by marble columns terminating at the Eastern end with a semi-circular apse.
The following overhead view shows you the basic arrangement of the church proper (minus the aforementioned forecourt that sat before, much like San Clemente or San Paolo in Rome).
Suffice it to say, this is an arrangement that is as equally familiar in Rome proper as it is in Byzantium.
Regrettably little remains of this church at this point, dedicated to an unknown martyr, but what does remain is an impressive mosaic floor that contains many symbols and designs found in the paleochristian world. Perhaps the most impressive is that which shows the Chi-Rho with the Alpha and Omega suspended by birds and around it a circle and intertwined knotwork.