sentences:  In the years that followed, the archdiocese's churches stopped ringing their bells to avoid inciting Islamic extremist violence.Because of his humanitarian and anti-imperialist works, the Duval was chosen by the Revolutionary Council as one of four clergymen who would visit the hostages held in the American embassy in Tehran on Christmas Day 1979.On 19 April 1988 he resigned as Algiers' archbishop, after thirty-four years of service.