The Seven Churches of Revelation, also known as the Seven Churches of the Apocalypse and the Seven Churches of Asia, are seven major Churches of Early Christianity, as mentioned in the New Testament Book of Revelation. All of them are located in Asia Minor, present-day Turkey.

The city was famous in its day for the nearby Temple of Artemis (completed around 550 BC), which has been designated one of the Seven Wonders of the Ancient World. Its many monumental buildings included the Library of Celsus and a theatre capable of holding 24,000 spectators.

Two sites of the ancient city are today within Izmir's boundaries. The first site, probably founded by indigenous peoples, rose to prominence during the Archaic Period as one of the principal ancient Greek settlements in western Anatolia. The second, whose foundation is associated with Alexander the Great, reached metropolitan proportions during the period of the Roman Empire.

During the Hellenistic period, it became the capital of the Kingdom of Pergamon in 281–133 BC under the Attalid dynasty, who transformed it into one of the major cultural centres of the Greek world. Many remains of its monuments can still be seen and especially the masterpiece of the Pergamon Altar. Pergamon was the northernmost of the seven churches of Asia cited in the New Testament Book of Revelation.

Thyateira (also Thyatira; Ancient Greek: Θυάτειρα) was the name of an ancient Greek city in Asia Minor, now the modern Turkish city of Akhisar ("white castle"), Manisa Province. The name is probably Lydian. It lies in the far west of Turkey, south of Istanbul and almost due east of Athens. It is about 50 miles (80 km) from the Aegean Sea.

Sardis was an ancient city best known as the capital of the Lydian Empire. After the fall of the Lydian Empire, it became the capital of the Persian satrapy of Lydia and later a major center of Hellenistic and Byzantine culture. Now an active archaeological site, it is located in modern day Turkey, in Manisa Province near the town of Sart.

Alaşehir (Turkish pronunciation: ) is a town and district of Manisa Province in the Aegean region of Turkey. It is situated in the valley of the Kuzuçay (Cogamus in antiquity), at the foot of the Bozdağ Mountain (Mount Tmolus in antiquity). The town is connected to İzmir by a 105 km (65 mi) railway.

It was located in the Hellenistic regions of Caria and Lydia, which later became the Roman Province of Phrygia Pacatiana. It is now situated near the modern city of Denizli.