Join 慈善・非営利 upcoming events being held in Siedlec. Siedlec, Poland, boasts a rich history and vibrant culture, known for the stunning White Stork Synagogue, the largest brick synagogue in the world, and the historic Siedlec Cathedral, as well as being a gateway to the beautiful Siedlecka Forest and home to various cultural events, making it an ideal destination for history enthusiasts and nature lovers alike.