During Roman times the Cardo was Jerusalem's main street, and it must have been quite a view: lined by columns that linked as roofed arcades above pedestrians, it was 22 meters wide and teemed with carriages and cattle. The street has been rediscovered and partially restored by archaeologists in 1975. While walking, you'll see the wall remains of the First and Second Temple, columns, and typical stone brick pavements. In the north, there is an authentic bazaar which dates back to the Crusades era.

Built upon the remains of a mosque, this church is dedicated to the city's patron saints, whose martyrdom coincides with the traditional date of the city's reconquest, believed to have occurred on July 17, 1243. The structure is a single-nave Gothic temple, featuring side chapels between buttresses that date back to the 14th and 15th centuries. The presbytery and the side doorway, known as the Anunciación, are designed in Renaissance style. Alongside the nave, the Baroque Communion Chapel can be found. The main facade is adorned with a grand doorway, also in Baroque style, which was crafted by Antonio Villanueva and Cristóbal Sánchez. Particular attention should be given to the Gothic-style bell tower, which is remarkably slender and likely completed in the mid-15th century. The tower features gargoyle-shaped drains in its corners and sculptures of mythical beasts. Additionally, the clock, commissioned by the town council in 1439, is of historical interest.

Patras Castle stands on the city's highest point, built over the ancient acropolis in the 6th century. Its strategic location grants you panoramic views over the city, the port, and the Gulf of Patras. The site is an open-air historical archive, its triangular walls and towers bearing the architectural imprints of Byzantine, Frankish, Venetian and Ottoman occupiers. Today, it functions as a free public park where you can walk the grounds, explore the ruins and find shaded benches.

Constructed around the Church of the Holy Sepulchre, in the north-western part of the Old City, the area is home to several Christian sights. Few houses can be found here — it's mostly about religious buildings, educational facilities, and a plethora of cafés, restaurants, and shops. The streets are packed with vendors. It is especially worth exploring the area of Mauristan, teeming with shops and colourful stalls. Used as a market during the Roman Empire, the area hosted churches and hospices during the Crusades (in Persian, "Mauristan" means hospital).