Old City of Jerusalem in the context of "Church of the Holy Sepulchre"

Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean and the Dead Sea. It is one of the oldest cities in the world, and is considered holy to the three major Abrahamic religions—Judaism, Christianity and Islam. Both Israel and Palestine claim Jerusalem as their capital city; Israel maintains its primary governmental institutions there, while Palestine ultimately foresees it as its seat of power. Neither claim is widely recognised internationally.

Throughout its long history, Jerusalem has been destroyed at least twice, besieged 23 times, captured and recaptured 44 times, and attacked 52 times. The part of Jerusalem called the City of David shows first signs of settlement in the 4th millennium BCE, in the shape of encampments of nomadic shepherds. During the Canaanite period (14th century BCE) Jerusalem was named as Urusalim on ancient Egyptian tablets, probably meaning "City of Shalem" after a Canaanite deity. During the Israelite period, significant construction activity in Jerusalem began in the 10th century BCE (Iron Age II), and by the 9th century BCE the city had developed into the religious and administrative centre of the Kingdom of Judah. In 1538 the city walls were rebuilt for a last time around Jerusalem under Suleiman the Magnificent of the Ottoman Empire. Today those walls define the Old City, which since the 19th century has been divided into four quarters—the Armenian, Christian, Jewish and Muslim quarters. The Old City became a World Heritage Site in 1981, and is on the List of World Heritage in Danger. Since 1860 Jerusalem has grown far beyond the Old City's boundaries. In 2023 Jerusalem had a population of 1,028,366. In 2022 60% were Jews and almost 40% were Palestinians. In 2020 the population was 951,100, of which Jews comprised 570,100 (59.9%), Muslims 353,800 (37.2%), Christians 16,300 (1.7%) and 10,800 unclassified (1.1%).

The Temple in Jerusalem, or alternatively the Holy Temple (Biblical Hebrew: בֵּית־הַמִּקְדָּשׁ, romanized: Bēṯ ham-Miqdāš; Arabic: بيت المقدس, Bayt al-Maqdis), refers to the two religious structures that served as the central places of worship for Israelites and Jews on the Temple Mount in the Old City of Jerusalem. According to the Hebrew Bible, the First Temple was built in the 10th century BCE, during the reign of Solomon over the United Kingdom of Israel. It stood until c. 587 BCE, when it was destroyed during the Babylonian siege of Jerusalem. The exact location of this temple on the temple mount is debatable.

Almost a century later, the First Temple was replaced by the Second Temple, which was built after the Neo-Babylonian Empire was conquered by the Achaemenid Empire. While the Second Temple stood for a longer period of time than the First Temple, and was renovated by Herod the Great, it was destroyed during the Roman siege of Jerusalem in 70 CE.

The Walls of Jerusalem (Hebrew: חומות ירושלים, Arabic: أسوار القدس) surround the Old City of Jerusalem (approx. 1 km). In 1535, when Jerusalem was part of the Ottoman Empire, Sultan Suleiman the Magnificent ordered the ruined city walls to be rebuilt. The walls were constructed between 1537 and 1541. The walls are visible on most old maps of Jerusalem over the last 1,500 years.

The length of the walls is 4,018 meters (2.497 miles), their average height is 12 meters (39 feet) and the average thickness is 2.5 meters (8.2 feet). The walls contain 34 watchtowers and seven main gates open for traffic, with two minor gates reopened by archaeologists.

The Armenian Quarter (Armenian: Հայոց թաղ, romanized: Hayots t'agh; Arabic: حارة الأرمن, romanized: Ḥāraṫ al-Arman; Hebrew: הרובע הארמני, romanized: Ha-Rova ha-Armeni) is one of the four sectors of the walled Old City of Jerusalem. Located in the southwestern corner of the Old City, it can be accessed through the Zion Gate and Jaffa Gate. It occupies an area of 0.126 km² (126 dunam), which is 14% of the Old City's total. In 2007, it had a population of 2,424 (6.55% of Old City's total). In both criteria, it is comparable to the Jewish Quarter. The Armenian Quarter is separated from the Christian Quarter by David Street (Suq el-Bazaar) and from the Jewish Quarter by Habad Street (Suq el-Husur).

The Armenian presence in Jerusalem dates back to the 4th century CE, when Armenia adopted Christianity as a national religion and Armenian monks settled in Jerusalem. Hence, it is considered the oldest living diaspora community outside the Armenian homeland. Gradually, the quarter developed around the St. James Monastery—which dominates the quarter—and took its modern shape by the 19th century. The monastery houses the Armenian Apostolic Church's Jerusalem Patriarchate, which was established as a diocese in the 7th century CE. The patriarchate is the de facto administrator of the quarter and acts as a "mini-welfare state" for the approximately 2,000 Armenian residents.

The Jewish Quarter (Hebrew: הרובע היהודי, romanized: HaRova HaYehudi; Arabic: حارة اليهود, romanized: Ḥāraṫ al-Yehūd) is one of the four traditional quarters of the Old City of Jerusalem. The area lies in the southwestern sector of the walled city, and stretches from the Zion Gate in the south, along the Armenian Quarter on the west, up to the Street of the Chain in the north and extends to the Western Wall and the Temple Mount in the east. In the early 20th century the Jewish population of the quarter reached 19,000.

During the 1948 war, the Jewish Quarter fought the Arab Legion as part of the battle for Jerusalem, and the Hurva synagogue was blown up by Arab legionnaires. In May 1948, the Jewish Quarter surrendered; some Jews were taken captive, and the rest were evacuated. A crowd then systematically pillaged and razed the quarter.

The Muslim Quarter (Arabic: حارة المسلمين, romanized: Ḥāraṫ al-Muslimīn; Hebrew: הרובע המוסלמי, romanized: Ha-Rovah ha-Muslemi) is one of the four sectors of the ancient, walled Old City of Jerusalem. It covers 31 hectares (77 acres) of the northeastern sector of the Old City. The quarter is the largest and most populous of the four quarters and extends from the Lions' Gate in the east, along the northern wall of the Temple Mount in the south, to the Damascus Gate—Western Wall route in the west. The Via Dolorosa starts in this quarter, a path Jesus had to take when he was forced by Roman soldiers, on his way to his crucifixion.The population of the Muslim Quarter was reported in 2012 as 22,000.

The "Third Temple" (Hebrew: בֵּית הַמִּקְדָּשׁ הַשְּׁלִישִׁי‎, Bēṯ hamMīqdāš hašŠlīšī, transl. 'Third House of the Sanctum') refers to a hypothetical rebuilt Temple in Jerusalem. It would succeed the First Temple and the Second Temple, the former having been destroyed during the Babylonian siege of Jerusalem in c. 587 BCE and the latter having been destroyed during the Roman siege of Jerusalem in 70 CE. The notion of and desire for the Third Temple is sacred in Judaism, particularly in Orthodox Judaism. It would be the most sacred place of worship for Jews. The Hebrew Bible holds that Jewish prophets called for its construction prior to, or in tandem with, the Messianic Age. The building of the Third Temple also plays a major role in some interpretations of Christian eschatology.

Among some groups of devout Jews, anticipation of a future project to build the Third Temple at the Temple Mount in the Old City of Jerusalem has been espoused as an ideological motive in Israel. Building the Third Temple has been contested by Muslims due to the existence of the Dome of the Rock, which was built by the Umayyad Caliphate on the site of the destroyed Solomon's Temple and Second Temple; tensions between Jews and Muslims over the Temple Mount have carried over politically as one of the major flashpoints of the Israeli–Palestinian conflict, and the area has been a subject of significant debate in the Israeli–Palestinian peace process. Most of the international community has refrained from recognizing any sovereignty over Jerusalem due to conflicting territorial claims between Israel and the Palestinian National Authority, as both sides have asserted it as their capital city.