U.S. Roman Catholic bishops on Monday pledged to uphold marriage as a heterosexual union.

The U.S. Conference of Catholic Bishops (USCCB) held their first assembly in Baltimore since the Supreme Court declared that gay and lesbian couples have a constitutional right to marry.

According to the AP, some who attended the gathering vowed to reverse the June ruling.

Archbishop Joseph Naumann of Kansas City, Kansas called for a concerted effort to “build a consensus” to overturn the decision.

“I don't think because five Supreme Court justices change the public policy on such a fundamental issue that we should just accept it,” he said. “I think we have to be as strong as we have on the pro-life issue.”

Others said that they support legal protections for individuals and businesses who oppose marriage equality.

Archbishop Carlo Maria Vigano, the Vatican official who arranged a controversial meeting between Pope Francis and Kim Davis, received a warm welcome at the gathering.

Davis is the Kentucky clerk who is fighting to keep her office from issuing marriage licenses to gay couples.

Vigano received two standing ovations from the bishops during his remarks.