they undertook a massive construction project , bringing in investments from private donors , some of whom wished for a museum wing to be added to bring in exhibitions of fine art , and some of whom asked for a yamian cultural center to be added to the top floor , as well as a library full of books by noted historians of the republic on the true roots of yamian heritage ; in addition to this , some donors requested that displays full of primitive ceramics and weaponry be placed in the lobby outside the seating area ; nature-loving donors asked that a 15-acre arboretum be founded adjacent to the building where species of flora native to yami could be preserved and appreciated by tourists from roped off gravel paths .