See Architecture Review Board.
Architecture Landscape is by definition view of all Enterprise Architecture of an organization. The architecture landscape holds all architectural views and state of architecture at a given time.
Accordingly to TOGAF, The highest level (typically) of description of an organization and typically covers all missions and functions. An enterprise will often span multiple organizations. In many cases it can referred as entire business of an organization.
Template illustrating a proven architectural solution for a known problem. Technical domain-specific high-level blueprint of building blocks and their alignment. Not all reference models map to a reference architecture.