1858 yılında Kayseri’nin Mancusun Köyü’nde Ermeni bir ailenin çocuğu olarak doğan Arakel Garabed Sivasliyan, Osmanlı’nın ilk doktoralı astronom ve matematikçisidir. Parlak zekâsı ve gayretiyle dolu dolu bir ömre imzasını atan Sivasliyan’ın, Kayseri’den sonraki durağı hayatının kalan kısmını adadığı Merzifon’daki Anadolu Koleji’dir. Bir Amerikan misyoner okulu olan Anadolu Koleji’nde dini eğitimini tamamladıktan sonra bu okulda öğretmenliğe başladı. Sivasliyan 1890 yılında Anadolu Koleji tarafından Amerika’da bulunan Carleton College’a ve Goodsell Gözlemevi’ne yüksek matematik ve astronomi eğitimi almak için gönderildi. Amerika’da özellikle astronomi üzerine çalışmalar yaptı ve Goodsell Gözlemevi’nde gözlemlerde bulunarak gökyüzünün fotoğraflarını çekti. Bu fotoğrafların bazıları Popular Astronomy dergisinde yayınlandı. Hocaları tarafından her zaman takdir edilen Sivasliyan’ın Merzifon’a döndükten sonra da Amerika’daki hocalarıyla irtibatı ve bilimsel çalışmaları vefatına kadar devam etti
Arakel Garabed Sivaslian , who was born as a son of an Armenian family in the village of Mancusun in Kayseri in 1858, was the first person in the Ottomans who had ever received a Ph. D. degree in Astronomy and Mathematics. Having achieved a lot of things during his life with the help of his great intelligence and efforts, A. G. Sivaslian chose Anatolia College in Merzifon Marsovan , to which he dedicated the rest of his life indeed as the next destination for himself after Kayseri. After he had completed his religious education in Anatolia College, which was an American missionary school, he started teaching in this school. He was sent to Carleton College and Goodsell Observatory in America by Anatolia College in 1890 to get a higher degree in Mathematics and Astronomy. He carried out some studies, particularly on Astronomy in America and took photographs of the sky by making observations in Goodsell Observatory. Some of these photographs were published in the magazine of Popular Astronomy. A. G. Sivaslian, who was appreciated by his instructors, also went on keeping in touch with his instructors in America and scientific studies with them after having returned to Merzifon until he passed away