The traditional architectural monuments in Thimphu, as in the rest of Bhutan, are of typical Bhutanese architecture of monasteries, dzongs (most striking fortress type structures), chortens, gateways, Lhakhangs, other sacred places and royal palaces, which are the most distinctive architectural forms of Bhutan. Prayer Flags, Mani Walls and Prayer Wheels present a propitious setting throughout the urban agglomerate of Thimphu. The most prominent architecturally elegant, traditional Bhutanese building structures in Thimphu are the Tashichho Dzong, Drubthob Goemba (now the Zilluka nunnery), Tango Goempa or Cheri Goempa, the Memorial Chorten, Thimphu, Dechen Phodrang, and Changangkha Lhakhang, all vintage monuments with rich history.