The **Tree of Life – Or L'Simcha Congregation**, commonly known as the Pittsburgh Synagogue, is a prominent Conservative Jewish synagogue located in the Squirrel Hill neighborhood of Pittsburgh, Pennsylvania. Founded originally as an Orthodox congregation in 1864 by Jewish immigrants, it evolved into a Conservative synagogue and merged with Congregation Or L'Simcha in 2010. The synagogue is known for its blend of traditional Jewish values with progressive and egalitarian practices, including gender-inclusive roles in religious services[1][2][8]. The synagogue holds significant historical and cultural importance within Pittsburgh's Jewish community, situated in Squirrel Hill, one of the largest Jewish neighborhoods in the United States. Its current building, opened in 1953, features a large sanctuary seating around 1,250 people and is marked by modernist stained-glass windows depicting themes of creation, Jewish law, and social responsibility. This reflects the congregation’s commitment to both heritage and contemporary relevance[2]. Tree of Life has been a center for spiritual life, education, and community events, supporting daily services, holiday observances, and lifecycle celebrations. It also rents space to other Jewish congregations, fostering a broader communal network. The synagogue’s history includes notable progressive religious reforms initiated under Rabbi Herman Hailperin's 45-year leadership, such as introducing organ music and expanding women's participation[2]. A tragic and defining moment in its recent history was the 2018 mass shooting, where 11 worshippers were killed during a Sabbath service. This event drew national attention, highlighting issues of antisemitism and community resilience. The victims, including a 97-year-old woman who had been part of the congregation for over six decades, exemplified the synagogue’s role as a vibrant, multi-generational community center[1][6]. Today, Tree of Life continues to serve as a vital religious and cultural institution, actively engaging members with a mission rooted in tradition, inclusivity, and social justice, makin