Prosperity ended in 1100 or 1101, when Haifa was besieged and blockaded by European Christians shortly after the end of the First Crusade, and then conquered after a fierce battle with its Jewish inhabitants and Fatimid garrison.It was a part of the Principality of Galilee within the Kingdom of Jerusalem.The ultimate origin of the name Haifa remains unclear.One theory holds it derives from the name of the high priest Caiaphas.Some Christians believe it was named for Saint Peter, whose Aramaic name was Keiphah.meaning "mound of the Ficus sycomorus", and in Arabic as Tell el-Semak or Tell es-Samak, meaning "mound of the sumak trees", names that preserved and transformed the ancient name, by which the town is mentioned once in the Mishnah (composed c. This synonymizing of the names is explained by Moshe Sharon, who writes that the twin ancient settlements, which he calls Haifa-Sycaminon, gradually expanded into one another, becoming a twin city known by the Greek names Sycaminon or Sycaminos Polis.Around the 6th century, Porphyreon or Porphyrea is mentioned in the writings of William of Tyre, and while it lies within the area covered by modern Haifa, it was a settlement situated south of Haifa-Sycaminon.
In the 9th century under the Umayyad and Abbasid Caliphates, Haifa established trading relations with Egyptian ports and the city featured several shipyards.
The earliest known settlement in the vicinity was Tell Abu Hawam, a small port city established in the Late Bronze Age (14th century BCE).
In the 3rd century CE, Haifa was known as a dye-making center.
From upper left: View of Haifa at night from Mount Carmel; Bahá'í World Centre; aerial view of the Haifa University; Ahmadiyya Mahmood Mosque; the Carmelit; National Museum of Science, Technology, and Space; view of Haifa during the day from Mount Carmel.
is the third-largest city in Israel – after Jerusalem and Tel Aviv – with a population of 283,640 in 2018.