Helena Kagan and Rebecca Sieff, 1955 Physician Helena Kagan (L) and WIZO's first president Rebecca Sieff (R) at the opening of WIZO's Rebecca Sieff Center for the Family in 1955, alongside the center's first director. Courtesy of WIZO Archives, Tel Aviv. Print Full Image Date / time 1955 Institution WIZO Archives, Tel Aviv Related contentEncyclopedia Article: Helena KaganEncyclopedia Article: Rebecca SieffEncyclopedia Article: WIZO: Women's International Zionist Organization (1920-1970)