Black Altar is an orthodox black metal band formed in 1996 in Olsztyn, Poland, and currently based in London, England. Founded and fronted by the multi-instrumentalist Dariusz "Shadow" Sieradzki, the project is highly regarded as one of the most prominent black metal entities emerging from Central and Eastern Europe. The band’s music and identity are anchored in themes of Satanism, death, misanthropy, and darkness.