SOUTH END -- More than 2,000 congregants packed the South End’s Cathedral of the Holy Cross Nov. 23 to attend the Mass to mark the closing of the archdiocese’s bicentennial year celebrated by Cardinal Seán P. O’Malley.

“We have been blessed as a Church during this Bicentennial Year. Our people, clergy, religious, deacons, parishes, schools, and ministries have all joined together in the presence of our Lord to celebrate our faith as one Catholic community,” the cardinal.

“From every corner of our Archdiocese, we have prayed and worshiped together reflecting on our rich history and with great joy for the future of our local Church,” he said.

To commemorate the Bicentennial Year, the cardinal blessed a plaque to be installed in the cathedral as a perpetual memento of the historic occasion.

The Archdiocese of Boston, along with the Archdioceses of Philadelphia, New York and Louisville, Ky., was created in 1808 from the territory belonging to the Diocese of Baltimore, which at the time encompassed the entire United States.

The celebrations of the archdiocese’s bicentennial have followed the liturgical year. They began with an opening Mass Dec. 2, 2007, the first Sunday in Advent, and concluded with the Solemnity of Christ the King, the last Sunday in Ordinary Time.

The Mass began with a procession by 34 of the national communities of the archdiocese, most in their traditional dress and carrying the flag of their nation, which they posted on the left-hand side of the altar.

In addition to the more than 150 priests, the cardinal was joined by concelebrants Cardinal Justin F. Rigali of Philadelphia, Archbishop Alfred C. Hughes of New Orleans and a former auxiliary bishop of Boston, as well as more than 20 bishops from New England and around the country.

“I am pleased to join with Cardinal O’Malley and the people of the Archdiocese of Boston for this important and prayerful moment in their history,” said Cardinal Rigali, whose mother was born and raised in Boston.

“As brothers and sisters in Christ, the faithful of the Archdiocese of Philadelphia join with the Catholic community of Boston in celebration of our bicentennials recognizing God’s sustaining presence in our parishes, schools, and social service ministries,” said the cardinal, whose own archdiocese shares it bicentennial with Boston. “We pray that God continues to bless the Archdiocese of Boston with His loving grace.”

The leader of Boston’s Melkite Catholic community, the Eparchy of Newton Cyril S. Bustros, who joined Cardinal O’Malley on the altar, said he was honored to participate in the closing Mass.

The archdiocese’s diversity was again expressed during the General Intercessions, which were proclaimed in Portuguese, Cape Verdean Creole, Haitian Creole, American Sign Language, Korean, Igbo-Nigerian, Irish and English.

The Mass’s music program was one more tribute to the Church in Boston’s rich ethnic mosaic with different parts of the service accompanied by the Cathedral Festival Choir, made up of singers from several parishes, the Archdiocesan Black Catholic Choir, the Cathedral Brass Ensemble and choirs from the Chinese, Ugandan and Indian communities.

The cardinal inaugurated the Cherverus Medal, a sterling silver medallion with the likeness and coat of arms of Bishop Jean-Louis Cheverus, the city’s first bishop, which he presented to 68 individuals after Communion.

The medal was awarded to individuals who have demonstrated outstanding Christian leadership and service at parishes, agencies and schools in the archdiocese.

In his blessing of the medals, the cardinal said, “I am privileged to have the opportunity today to honor these men and women, whose selfless dedication and commitment has greatly contributed to our carrying out our mission given to us by Jesus Christ.”

As Father Kevin J. O’Leary, the cathedral’s rector, read the list of names, the cardinal approached each recipient, who stood forming a half-circle in front of the altar, and placed the medal with a red sash around their necks.

Deacon Leo J. Donoghue, who assisted the cardinal during the Mass along with Deacons Anthony P. Rizzuto and Charles I. Clough, said his being with the cardinal as he presented the medals gave him a unique perspective.

“It was not supposed to be a spiritual experience, but it was a spiritual experience for me,” he said.