The hat for Róisín Bán at the Obama show

In case you missed it elsewhere, Justice Scalia turned up at the inauguration of President Obama wearing a replica hat as worn by St Thomas More.  Lynda, leaving a comment in one of my posts suggests it's an example of Róisín Bán. 

Future pub quiz question, who was sworn in four times as President of the United States?  Why Obama of course.