During different periods, the city walls followed different outlines and had a varying number of gates. During the era of the crusader Kingdom of Jerusalem for instance, Jerusalem had four gates, one on each side. The current walls were built by Suleiman the Magnificent, who provided them with six gates; several older gates, which had been walled up before the arrival of the Ottomans, were left as they were. As to the previously sealed Golden Gate, Suleiman at first opened and rebuilt it, but then walled it up again as well. The number of operational gates increased to seven after the addition of the New Gate in 1887; a smaller eighth one, the Tanners' Gate, has been opened for visitors after being discovered and unsealed during excavations in the 1990s. The sealed historic gates comprise four that are at least partially preserved (the double Golden Gate in the eastern wall, and the Single, Triple, and Double Gates in the southern wall), with several other gates discovered by archaeologists of which only traces remain (the Gate of the Essenes on Mount Zion, the gate of Herod's royal palace south of the citadel, and the vague remains of what 19th-century explorers identified as the Gate of the Funerals (Bab al-Jana'iz) or of al-Buraq (Bab al-Buraq) south of the Golden Gate).