Greek majority and their rights. For the most part, the Turks disregarded this agreement and implemented a series of contrary measures which resulted in a further decline of the Greek population, as evidenced by demographic statistics. Punitive Turkish nationalist exclusivist measures, such as a 1932 parliamentary law, barred Greek citizens living in Turkey from a series of 30 trades and professions from tailoring and carpentry to medicine, law and real estate. In 1934, Turkey created the Surname Law which forbade certain surnames that contained connotations of foreign cultures, nations, tribes, and religions. Many minorities, including Greeks, had to adopt last names of a more Turkish rendition. As from 1936, Turkish became the teaching language (except the Greek language lessons) in Greek schools. The Wealthy Levy imposed in 1942 also served to reduce the economic potential of Greek businesspeople in Turkey. When the Axis attacked on Greece during WW2 hundreds of volunteers from the Greek community of Istanbul went to fight in Greece with the approval of Turkish authorities. In 6–7 September 1955 an anti-Greek pogrom were orchestrated in Istanbul by the Turkish military's Tactical Mobilization Group, the seat of Operation Gladio's Turkish branch; the Counter-Guerrilla. The events were triggered by the news that the Turkish consulate in Thessaloniki, north Greece—the house where Mustafa Kemal Atatürk was born in 1881—had been bombed the day before. A bomb planted by a Turkish usher of the consulate, who was later arrested and confessed, incited the events. The Turkish press conveying the news in Turkey was silent about the arrest and instead insinuated that Greeks had set off the bomb. Although the mob did not explicitly call for Greeks to be killed, over a dozen people died during or after the pogrom as a result of beatings and arson. Jews, Armenians and others were also harmed. In addition to commercial targets, the mob clearly targeted property owned or administered by the Greek Orthodox Church. 73 churches and 23 schools were vandalized, burned or destroyed, as were 8 asperses and 3 monasteries. The pogrom greatly accelerated emigration of ethnic Greeks from Turkey, and the Istanbul region in particular. The Greek population of Turkey declined from 119,822 persons in 1927, to about 7,000 by 1978. In Istanbul alone, the Greek population decreased from 65,108 to 49,081 between 1955 and 1960. In 1964 Turkish prime minister İsmet İnönü unilaterally renounced the Greco-Turkish Treaty of Friendship of 1930