The square has been the site of political protests , including some in 1969 known as Bloody Sunday , and a terrorist attack in 1978 ( Beyazıt Massacre ) . In 1915 twenty Armenian activists were hanged in the square ( The 20 Hunchakian gallows )
The 20 Hunchakian gallows
The 20 Hunchakian gallows
Beyazıt Square