More than 150 historians and researchers have signed up to access the soon-to-open Vatican archives of Pope Pius XII, evidence of the intense scholarly interest into the World War II-era pope and his record during the Holocaust, officials said Thursday. Cardinal José Tolentino Calaça de Mendonça, the Vatican’s chief librarian, told reporters that all researchers — regardless of nationality, faith and ideology — were welcome to request permission to use the Vatican’s Apostolic Library, which will open the archive on March 2. Emeritus Pope Benedict XVI, a great defender of Pius, accelerated the process to open the archives ahead of schedule so that researchers could have their say.