Lorenzo Martinez Tañada Sr., or "Ka Tanny" CCLH (born Lorenzo Tañada y Martinez; August 10, 1898 – May 28, 1992), was a Filipino nationalist lawyer, solicitor general, senator, national athlete, and human and civil rights defender best known for his many contributions to Philippine nationalism and independence. As first post-war solicitor general, longest serving senator for 24 years, and staunch opposition to martial law under Ferdinand Marcos. He is also equally renowned for his efforts to stop the continued presence of US military bases in the Philippines through the Anti-Bases Coalition (ABC). Senator Tañada was a founder of the Free Legal Assistance Group (FLAG), which is the largest group of human rights lawyers nationwide. Tañada was also the chairman of the Justice for Aquino, Justice for All (JAJA) movement that sought to oust Marcos after the assassination of former Sen. Ninoy Aquino. He was also the founding chairman of a merged party called PDP-LABAN that opposed Marcos in the 1978 elections, and he founded the Nuclear-Free Philippines Coalition or NFPC, which successfully prevented the opening of the Bataan Nuclear Power Plant under the Marcos administration. Serving in the Philippine Senate for 24 years beginning in 1947 up until 1971, he is the longest-serving senator in Philippine history and is referred to as the "Grand Old Man of Philippine Politics."