Baptistery of St. John the Baptist (Thessaloniki)

The Hagia Sophia (Greek: Ἁγία Σοφία, Holy Wisdom) is a church located in Thessaloniki, Greece. With its current structure dating from the 7th century, it is one of the oldest churches in the city still standing today. Because of its outstanding Byzantine art and architecture, in addition to its importance in early Christianity, it is one of several monuments in Thessaloniki listed as a UNESCO World Heritage Site in 1988.

The Longos Mansion (Greek: Μέγαρο Λόγγου), also known as the Red House (Κόκκινο Σπίτι) due to its red brick exterior, is a three-storey house in Agias Sofias Square in the center of Thessaloniki. It was designed in 1926 by architect Leonardo Gennari for the family of Grigorios Longos, a wealthy textile industrialist from Naousa, in the Neobyzantine style. He later gave it to his brother, Ioannis, which is why it is known as "Ioannis Longos mansion". In 1983, it was listed by the Greek Ministry of Culture for preservation.The company that undertook its construction went bankrupt a few months later and Longos' factory in Naousa was destroyed by a fire. As a result, rumors were created about suicides and ghosts in the abandoned mansion.Until 1992, there was a cafe called "Ermis" on the ground floor, frequented by retired teachers and professors. Today, in its place, there is a restaurant called "Kourdisto Gourouni" (meaning Clockwork Pig). In early 2014, Ivan Savvidis, the wealthy businessman and owner of football team PAOK FC, bought the house for four million euros. A store selling official PAOK merchandise operates there now.

Agias Sofias Square (Greek: Πλατεία Αγίας Σοφίας) is a square in the city of Thessaloniki in Greece.

Aghia Sofia (Greek: Αγία Σοφία, literally Holy Wisdom) is an under-construction metro station serving Thessaloniki Metro's Line 1 and Line 2. The station is named after the church of Hagia Sophia, located nearby. It is expected to enter service in 2023 Construction of this station has been held back by major archaeological finds, and it is designated as a high-importance archaeological site by Attiko Metro, the company overseeing its construction. Here, as well as at Venizelou, Roman Thessaloniki's marble-clad and column-lined Decumanus Maximus (main east–west avenue), along with shops and houses, was found running along the route of the Via Egnatia (modern Egnatia Street) at 5.4 metres (18 ft) below ground level. Additionally, a public square was also found at this station. The discovery was so major that it delayed the entire Metro project for years. A historian dubbed the discovery "the Byzantine Pompeii". Aghia Sofia station will feature a mini museum within the station, similar to those of Athens Metro stations like Syntagma, which houses the Syntagma Metro Station Archaeological Collection. Unlike Venizelou, however, the archaeological finds will not be kept in situ; they will be disassembled and reassembled elsewhere. The station also appears in the 1988 Thessaloniki Metro proposal.

Egnatia Street (Greek: Οδός Εγνατίας) is the main commercial street in downtown Thessaloniki. The road is named for the Roman-era Via Egnatia which passed near the city. Lined with shops and office buildings, it is one of the busiest streets of Thessaloniki.

Navarinou Square (Greek: Πλατεία Ναυαρίνου) is a square in the city of Thessaloniki in Greece. It is named after the Battle of Navarino, a crucial battle of the Greek War of Independence.

The Church of the Acheiropoietos (Greek: [Παναγία] Ἀχειροποίητος) is a 5th-century Byzantine church in the northern Greek city of Thessaloniki, Central Macedonia. It is located in the city's centre, at Agias Sofias street opposite Makedonomachon square. Because of its outstanding early Byzantine architecture, the church was inscribed on the UNESCO World Heritage List in 1988 along with other Paleochristian and Byzantine monuments of Thessaloniki.

The siege of Thessalonica in 254 was the successful defense of the city of Thessalonica by local Roman militia during an invasion of the Balkans by the Goths.

Menemeni is a suburb of the Thessaloniki Urban Area and was a former municipality in the regional unit of Thessaloniki, Greece. Since the 2011 local government reform it is part of the municipality Ampelokipoi-Menemeni, of which it is a municipal unit. It neighbors Evosmos, Ampelokipoi, Thessaloniki and Echedoros. Menemeni includes the quarters of Vosporos, Agios Nektarios, Dialogi and Lachanokipoi. According to the 2011 census the population was 14,746 inhabitants. The municipal unit has an area of 7.989 km2.

The Municipality of Thessaloniki (Greek: Δήμος Θεσσαλονίκης, Dímos Thessaloníkis) is the second largest municipality by population in Greece after the Municipality of Athens. According to the 2011 Greek census, it has a population of 324,766 inhabitants. The municipality includes the historical center (including the majority of the city's monuments) and about one third of the Thessaloniki Urban Area.

The Lordship of Chios was a short-lived autonomous lordship run by the Genoese Zaccaria family. Its core was the eastern Aegean island of Chios, and in its height it encompassed a number of other islands off the shore of Asia Minor. Although theoretically a vassal of the Byzantine Empire, the Zaccaria ruled the island as a practically independent domain from its capture in 1304 until the Greek-Byzantines recovered it, with the support of the local Greek population, in 1329. The island would return to Genoese control in 1346 under the Maona of Chios and Phocaea.

The Kingdom of Thessalonica (Greek: Βασίλειον τῆς Θεσσαλονίκης, romanized: Vasílion tis Thessaloníkis) was a short-lived Crusader State founded after the Fourth Crusade over conquered Byzantine lands in Macedonia and Thessaly.