A new church in Round Rock bills itself as the largest Catholic church in Central Texas. It seats more than 1,500 people. That may sound like a lot, but at Sunday’s inaugural mass, there were more than enough faithful to fill those seats. St. Williams Catholic Church says it has 12,000 registered members."[At the old building] we had to sometimes have people sit in the halls and watch church on TV," Father Joel McNeil said. "You couldn't get there late because you wouldn't get a seat. You had to get there at least 15 to 20 minutes earlier than...