The Holy Spirit Adoration Sisters are a Roman Catholic religious order of cloistered nuns . The nuns live a contemplative life, focused on perpetual adoration of the Blessed Sacrament , offering intercessory prayers for the world. Inside the cloister the nuns wear rose -colored habits in honor of the Holy Spirit . It is from these habits that they are nicknamed the "Pink Sisters." The congregation was founded in 1896 in Holland by Saint Arnold Janssen , a German diocesean priest. The first house was established in the United States in 1915 by Mother Mary Michaele in Pennsylvania , upon the invitation of Archbishop Edmund Francis Pendergast. Currently, there are 20 Houses located in Argentina , Brazil , Germany , India , Indonesia , the Netherlands , the Philippines , Poland , Togo , and the United States. This was taken in Tagaytay where you can find the Pink Sisters.