Constantine the Great laid out Constantinople's ceremonial spine — the Mese, or Middle Street — as a sequence of monumental plazas descending westward from the imperial center near the Hagia Sophia toward the city walls. Each emperor who expanded the city added to the chain. The Forum of Arcadius, built in 403 CE, anchored the western end of that sequence. It occupied the Xerolophos area on the city's seventh hill and was the final forum before the Mese reached the Constantinian city walls and passed through the Golden Gate. The forums it followed — those of Constantine, Theodosius, and the Forum Bovis among them — formed a processional logic to the city: the empire's power visible in stone and marble at regular intervals along the route every traveler took entering from the west.

At the forum's center stood the Column of Arcadius, modeled deliberately on Trajan's Column in Rome — the most prestigious precedent available to any emperor staging his victories in stone. Like Trajan's Column, it carried spiral bands of bas-relief sculpture winding upward around its shaft, narrating the military triumphs of the emperor Arcadius. The column rose more than 50 meters. On its summit, an enormous Corinthian capital supported an equestrian statue of Arcadius himself, added in 421 by his son Theodosius II. The statue did not survive. An earthquake in 704 toppled it from its perch and destroyed it. The column, stripped of its crowning image, continued to stand through Byzantine centuries, the Latin occupation, the Ottoman conquest, and centuries of urban growth around it — until that 1715 decision ended its tenure. Fragments of the relief sculpture survive in the Istanbul Archaeological Museum, offering tantalizing glimpses of what the full program once looked like.

After the Ottoman conquest of Constantinople in 1453, the forum's open space was repurposed as a bazaar. The Ottomans called it the Avrat Pazarı, which translates as the Women's Bazaar. The name has sometimes been confused with the slave market at Tavukpazarı, near the Nur-u Osmaniye Mosque, where women known as cariye — a category with a distinct legal and social status in Ottoman society, different from enslaved people in other legal systems — were bought and sold. That practice was abolished in 1847, during the tenure of Mustafa Reşid Pasha, partly under the influence of British abolitionist pressure following the Slavery Abolition Act of 1833. The Women's Bazaar at the former Forum of Arcadius was a separate institution, though the proximity of the names has long generated confusion in sources.

Today, in the Cerrahpaşa neighborhood near what was once the forum, a small courtyard holds what remains of the Column of Arcadius: a truncated base of rough stone, battered and stripped of its original facing, ringed by modest houses. It takes some imagination to see in it the foundation of something that once dominated the skyline of a world capital. The reliefs that wrapped the column's shaft — scenes of battle and triumph, soldiers and captives, the formal grammar of Roman imperial commemoration — were documented in drawings made before the 1715 demolition, and those drawings survive to show what the column depicted. The forum itself left no trace above ground until 1956, when construction work for new roads uncovered two pillars that likely belonged to a triumphal arch at the forum's entrance. Single architectural elements were also recovered then. The forum does not announce itself. You have to know to look.

Constantinople was famously built on seven hills, echoing Rome's own hilly topography as part of its founders' deliberate self-presentation. The Forum of Arcadius occupied the highest of those hills — the Xerolophos, the Dry Hill — and its position gave the Column of Arcadius extraordinary visibility across the city and the surrounding sea. Sailors approaching Constantinople from the Marmara would have seen it rising above the roofline. It was meant to be seen. The logic of imperial commemoration required height, scale, and duration. The forum achieved all three in its time. What neither its builders nor Arcadius himself could have anticipated is that the column would outlast the empire that built it by nearly three centuries before finally being brought down not by conquest or catastrophe, but by the mundane threat of falling on someone's house.