WASHINGTON (WUSA9) -- A group of demonstrators gathered on the National Mall to rally against the Supreme Court's decision to allow gay marriage.

About 100 people showed up to the event. It was organized by the National Organization for Marriage.

It came one year after the Supreme Court ruled that all US states were required to recognize same sex marriages. The National Organization for Marriage has called the ruling illegitimate.

"Across the board, we've seen our right to speak and act, undermined and threatened," said Brian Brown, the president of the National Organization for Marriage.

A few gay marriage supporters also showed up to the rally. One man told WUSA9 he's gone to previous rallies to counter the National Organization for Marriage's beliefs.

"They lost in the court of public opinion, they lost in the Supreme Court," said protester Larry Sternbane. "I think what they're trying to do now is to start a movement where they come back here every year on the anniversary of the Supreme Court decision to air their grievances."