The red sign of marriage equality will move beyond social media in Seattle Wednesday with a rally at the downtown federal courthouse.

The event will take place from noon to 1 PM at the US Federal Courthouse, located at 700 Stewart Street, as the U.S. Supreme Court weighs in this week on California’s Proposition 8 and the national Defense of Mar­riage Act. CHS reported on Capitol Hill businesses that signed on to lobby against the act.

“Broadly, the problem is that DOMA forces employers to put its lawfully-married employees in two categories,” Paul Villa, co-owner of The Lobby Bar, told CHS. “That creates regulatory, tax, benefits and morale problems, which the brief explains in detail.”

Hundreds are expected attend the rally, according to the Facebook event page:

The Supreme Court is hearing a case on DOMA and Prop 8. Let’s show our support for marriage equality for all people across the entire country by rallying at the federal courthouse at 700 Stewart Street in Seattle on March 27th, the day the court is hearing the case. Bring signs in support of equality and keep the rally positive! We are proud to announce that our rally is being officially sponsored by Social Outreach Seattle, Seattle Gay News, The Seattle Lesbian, and Pride at Work. Urban Press is generously donating the printing of all posters! The rally has also been formally endorsed by Martin Luther King County Labor Council.

According to Time.com, the equal sign meme was developed by the Human Rights Campaign, which advocates equal rights for lesbian, gay, bisexual and transgender people.