"The entire Bohri community in Houston stuck together like glue" since the sect members she was acquainted with "all lived in the same neighborhoods, were concentrated in the same few public schools, and often interacted solely with other Bohris." The Houston Bohri community increased in size during the post-September 11 attacks era. Ahmadiyya Houston has an Ahmadiyya community with a mosque. The mosque is located in northern Harris County. On Thursday, May 22, 2008, Sheikh Najam Ali ran an advertisement in his newspaper, the Pakistan Times, that stated that the Ahmadiyya were Muslim and that announced an Ahmadiyya celebration. Because of the advertisement, several distribution sites removed his newspapers, several anonymous callers gave him death threats, and several advertisers cancelled their services. In regards to the death threats, Jill Carroll of the Houston Chronicle wrote "Can we just resolve that we will resist death threats to people we don't like, or to people of whom we don't approve, especially in religious matters? Can we just say "no" to death threats or calls for people's death?" Individual mosques There is one mosque in Downtown Houston, the Islamic Da'wah Center. It is located in a three story building built by Ross S. Sterling. Constructed in 1928, it formerly housed the Houston National Bank. The exterior is made of black granite and limestone. Richard Vara of the Houston Chronicle stated that the building's eight columns are "reminiscent of ancient Greek colonnaded architecture." Gold leaf is used in the high-domed ceiling. Belgian, Portuguese, and Italian-imported marble is used in the interior. Hakeem Olajuwon purchased the building in 1994 so it could be made into a mosque. The treasurer of the facility, Hasan Tulbah, stated that the building initially needed major restoration. California artists did restoration work on the ceiling, which had received rain damage. Both men and women pray on the first floor, with each gender praying in a separate area separated by a screen. The second-floor mezzanine area is used as a prayer area for women. The Islamic library is located in an open bank vault in the basement. The basement also houses a reception hall and kitchen. The building is used as a da'wah center, and Vara wrote that "The building is regarded by the Houston Muslim community as one of the nation's premiere worship centers." Katy Islamic Center, the largest mosque in Greater Katy, is located in unincorporated Harris County. Operated