Multiple Democratic lawmakers this week replaced POW/MIA flags outside their Capitol Hill offices with a Transgender Equality flag to commemorate “Trans Visibility Week,” photos show.

The move reportedly came at the behest of the “National Center for Transgender Equality.” The group tweeted Tuesday that it had delivered the flags to every member of Congress – even Republicans – with the request that they be flown outside their offices.

Sen. Bernie Sanders, I-Vt., tweeted a photo of his office with the transgender flag displayed, writing: “Discrimination has no place in our society. I am proud to display this flag as a symbol of my support for transgender people across the country. We must stand with transgender people in all of our community.”