Sanctuary: 1. A place of refuge, especially for political refugees 2. immunity from arrest
The Concise Oxford Dictionary
With the army of a victorious Henry VII bearing down on him, a terrified Francis Lovell made for the only place he knew he would be safe – a church.
It was 1485 and his master Richard III had just been killed on the battlefield at Bosworth and Francis had every reason to believe his head would be next.
But he made it in time to St John’s Abbey in Colchester where he invoked the ancient law of religious sanctuary. It made him untouchable.
Claiming sanctuary in a church to avoid being punished for a crime was abolished in England in 1623 but the idea persists to this day. (see)
The antecedence for refuge in a sanctuary hark back to Numbers 35: 9 -
And the LORD spoke unto Moses, saying: ‘Speak unto the children of Israel, and say unto them: When ye pass over the Jordan into the land of Canaan, then ye shall appoint you cities to be cities of refuge for you, that the manslayer that killeth any person through error may flee thither. And the cities shall be unto you for refuge from the avenger, that the manslayer die not, until he stand before the congregation for judgment.
דַּבֵּר אֶל-בְּנֵי יִשְׂרָאֵל, וְאָמַרְתָּ אֲלֵהֶם: כִּי אַתֶּם עֹבְרִים אֶת-הַיַּרְדֵּן, אַרְצָה כְּנָעַן
וְהִקְרִיתֶם לָכֶם עָרִים, עָרֵי מִקְלָט תִּהְיֶינָה לָכֶם; וְנָס שָׁמָּה רֹצֵחַ, מַכֵּה-נֶפֶשׁ בִּשְׁגָגָה
וְהָיוּ לָכֶם הֶעָרִים לְמִקְלָט, מִגֹּאֵל; וְלֹא יָמוּת הָרֹצֵחַ, עַד-עָמְדוֹ לִפְנֵי הָעֵדָה לַמִּשְׁפָּט
The six cities of refuge were designated for all inhabitants regardless of citizenship “For the children of Israel, and for the stranger and for the settler among them,” and where designed to break the pre-existing rules of Blood Feuds whereby a relative of the murdered was required to redeem the blood גֹּאֵל הַדָּם of his relative by killing the murderer, even if the murder was accidental.
The City of Refuge is first and foremost the antidote to the negative aspects of clan and tribalism. The refuge cities עָרֵי מִקְלָט along with the monetization of lex talionis (eye for eye see Lev. 24:19 and Talmud Baba Kamma, 83b–84a) represented the Hebrew Bible’s frontal assault on the zero-sum mechanics of blood-for-blood honor killings.
Ironically, Israelis call a bomb shelter a Miklat מִקְלָט. The connection between the modern day bomb shelter and the Biblical city of refuge is profound. The modern day Miklat protects Israeli citizens from the attacks of terrorists who wish nothing positive, but only to take revenge for prior injustices and to redeem the blood of fellow clan members. In a very real sense, the Iron Dome Missile Defense system, the Miklat, and the security wall are all designed to end the cycle of violence.
When these same terrorist shoot rockets without sheltering their own citizens from the inevitable return fire, they are striving to escalate the blood feud, ditto for the use of their citizens as human shields.
The cinematic image we share of the fugitive finding refuge in a church shows how this legal institution of the City of Refuge survived in Church law and popular culture, but what is less well known, is how primary this message was to Muhammad’s message and early Islam.
According to Joseph Schacht, the celebrated Columbia professor of Arabic and Islam, Muhammad reformed the norms of retaliation with the introduction of blood-money “because of the main aim of the Prophet – [was] the dissolution of the ancient tribal organization and the creation of a community of believers in its stead.” [An Introduction to Islamic Law, Joseph Schacht, p 13-4)
See Quran Sura 4: 92
And never is it for a believer to kill a believer except by mistake. And whoever kills a believer by mistake – then the freeing of a believing slave and a compensation payment presented to the deceased’s family [is required] unless they give [up their right as] charity. But if the deceased was from a people at war with you and he was a believer – then [only] the freeing of a believing slave; and if he was from a people with whom you have a treaty – then a compensation payment presented to his family and the freeing of a believing slave. And whoever does not find [one or cannot afford to buy one] – then [instead], a fast for two months consecutively, [seeking] acceptance of repentance from Allah . And Allah is ever Knowing and Wise.
According to Schacht, Islam after Muhammad continued this evolution away from tribal revenge killings and toward the rule of law and restitution.
The Umayyads did not interfere with the working of retaliation as it had been regulated by the Koran, but they tried to prevent the recurrence of Arab tribal feuds which threatened the internal security of the state, and they assured the accountancy for payments of blood-money, which were effected in connexion with the payment of subventions. ibid. Schacht p. 24
Schacht, who was not Jewish, believed about Islam what many of his contemporary Jewish Scholars had concluded about Judaism, namely, that there was at one time a “living tradition” where ideas took on a life of their own and evolved forward, even if projected back to engender authenticity. (see Remembering Joseph Schacht (1902‑1969) by Jeanette Wakin) 
With regard to the subject at-hand, Schacht concludes that:
The considerable restriction of blood feuds was a great merit of Muhammad’s. According to Bedouin ideas, any member of the tribe of the killer, and even more than one, could be killed if homicide had occurred. Islam allows only the killer himself (or several killers for one slain), to be put to death, and only if he is fully responsible and has acted clearly with deliberate intent; Islamic law further recommends waiving retaliation. Ibid Schacht p 185
It’s a shame that, in the Islam we encounter today, the movement by the Prophet Muhammad and early local schools against tribalism and blood feuding was not permitted to develop further. It’s a shame that both Jews and Muslims do not have a miklat, a shelter, refuge and sanctuary to protect them from the evils of bloodletting and the cycle of violence that it drives.
In the meantime, the civilized world should honor and emulate the shelter that Israel provides it’s citizens as not only an acclimation of life but also as a concrete and practical strategy to break the cycle of violence and bloodletting.
 Writes Wakin: “Not surprisingly, scholars in the Muslim world in general are unable to accept Schacht’s discoveries or face their implications. … The understandable fear among modern Muslim scholars is that the great edifice of the religious law, and thus Islam itself, will collapse if it is shown to have been the product of human minds. Schacht’s findings can, of course, conceivably be put at the service of a liberalizing movement, but this has not yet been attempted.”