Kaptein is mastering Banten's Islamic history at Al-Khairiyah which claims to be the oldest Islamic school institution in Banten.
"I would like to say thank you as I am very pleased to be here and I hope to come again," Kaptein said.
Kaptein was welcomed by Vice Chairman of the Al-Khairiyah Executive Board, Alwiyan Q. Syam’un, and allowed access to Al-Khairiyah's three century-year- old Quran.
There has been good cooperation between Leiden University and Al-Khairiyah, and many of Banten's historical manuscripts were also placed in the Netherlands, Syam'un stated.
"I need those manuscripts to know more about Al-Khairiyah and Banten's history. Wish I can go there in the future," Syam'un said.