The foundations that have been incorporated into the pedestrian Rruga Toptani street are all that is left of Tirana's original castle, a military stronghold dating from some time between the 4th and 6th centuries, though there's also a stretch of defensive wall further along the street from Ottoman times. The Toptani family from Kruja took possession of the castle around 1800, leading to decades of conflict that was only settled by intermarrying the warring families, after which Tirana started growing. The bazaar-like Kalaja e Tiranës street inside the complex is lined by upmarket restaurants and shops.