The exact place where Jesus ascended into heaven is a mosque - Chapel of the Ascension, Jerusalem

The Chapel of the Ascension is a shrine located on the Mount of Olives, in the At-Tur district of Jerusalem. Part of a larger complex consisting first of a Christian church and monastery, then an Islamic mosque, it is located on a site the faithful traditionally believed to be the earthly spot where Jesus ascended into Heaven after His Resurrection. It houses a slab of stone believed to contain one of His footprints. The Status Quo, a 250-year-old understanding between religious communities, applies to the site
Shortly after the death and resurrection of Jesus, early Christians began gathering in secret to commemorate His Ascension at a small cave on the Mount of Olives.[3] The issuance of the Edict of Milan by the Roman Emperor Constantine I in 313 made it possible for Christians to worship overtly without fear of government persecution. By the time of the pilgrim Egeria's travels to Jerusalem in 384, the spot of veneration had been moved to the present location, uphill from the cave,[3] which had been integrated into the Constantinian Church of Eleona, dedicated by then just to Jesus' teachings about good and evil (Matthew 24:1-26:2).[4] Egeria witnessed the celebration of the Ascension at an "open hillock" near the cave.[5] The first church was erected there a few years later, sometime before 392, by a lady from the imperial family, Poimenia.[5] Later a legend attributed the church to Saint Helena, mother of Constantine I.[6] The legend holds that during Saint Helena's pilgrimage to the Holy Land between 326 and 328, she identified two spots on the Mount of Olives as being associated with Jesus' life - the place of His Ascension, and a grotto associated with His teaching of the Lord's Prayer - and that on her return to Rome she ordered the construction of two sanctuaries at these locations.[citation needed]

4th century church
The first complex constructed on the site of the present chapel was known as Imbomon (Greek for "on the hill"). It was a rotunda, open to the sky, surrounded by circular porticoes and arches. Sometime between AD 384-390, Poimenia, a wealthy and pious Roman aristocratic woman of the imperial family financed the building of a Byzantine-style church "around Christ's last footprints".[6]

The Imbomon, as well as the nearby Eleona Basilica and other monasteries and churches on the Mount of Olives, were destroyed by the armies of the Persian Shah Khosrau II during the final phase of the Byzantine-Sassanid Wars in 614.

12th century church
The reconstructed church was eventually destroyed, and rebuilt a second time by the Crusaders in the 12th-century. This final church was eventually destroyed by the armies of Salah ad-Din, leaving only a partially intact outer 12x12 meter octagonal wall surrounding an inner 3x3 meter shrine, also octagonal, called a martyrium or edicule. This structure still stands today,[7] in a form partially altered in the time after Saladin's 1187 conquest of Jerusalem.

Muslim changes since 1187
After the fall of Jerusalem in 1187 the ruined church and monastery were abandoned by the Christians, who resettled in Acre. During this time Salah ad-Din established the Mount of Olives as a waqf entrusted to two sheikhs, al-Salih Wali al-Din and Abu Hasan al-Hakari. This Waqf (Islamic trust) was registered in a document dated 20 October 1188.[8] The chapel was converted to a mosque, and a mihrab installed in it. Because the vast majority of pilgrims to the site were Christian, as a gesture of compromise and goodwill Salah ad-Din ordered the construction, two years later, of a second mosque nearby for Muslim worship while Christians continued to visit the main chapel. Also around this time the complex was fortified with towers, walls, and guarded by watchman.

The main structure of the chapel is from the Crusader era; the stone dome and the octagonal drum it stands on are Muslim additions. The exterior walls are decorated with arches and marble columns. The entrance is from the west, the interior of the chapel consists of a mihrab indicating the direction of Mecca in the south wall. On the floor, inside a stone frame, is a slab of stone called the "Ascension Rock".

Ascension rock
The octagonal ædicule surrounds the Ascension rock, said to contain the right footprint of Christ, the section bearing the left footprint having been taken to the Al-Aqsa Mosque in the Middle Ages. The faithful believe that the impression was made as Jesus ascended into Heaven and is venerated as the last point on earth touched by the incarnate Christ.

Arculf writes about "the footprints of Christ, plainly and clearly impressed in the dust", which he saw in ca. 680 CE