The Ladder will be preserved for generations to come. May 07 2021 3:33 PM EDT The cottage in San Francisco where lesbian pioneers Del Martin and Phyllis Lyon made their home and a haven for LGBTQ+ people beginning in 1955 has now been assigned landmark status. A request for the minimum of a plaque on the sidewalk will be submitted within six months, according to the The San Francisco Board of Supervisors voted unanimously on Tuesday to designate the hilltop home at 651 Duncan St. landmark status. The one-bedroom house was the place where Lyon and Martin founded the political group the Daughters of Bilitis in 1955.