Try to address as many of these as you can:
BUILDING NAME - a building may be known by several names (at once or over time), including variant names (Fallingwater or Falling Water), its street address (30 Rockefeller Plaza), or relationship to a client (Kaufmann Residence, Trump Tower, Wells Fargo Center). Collect them all!
BUILDING TYPE - often defined by function (which can change over time) but just as often defined by form or purpose
DATE - of design, start of construction, or construction completion
LOCATION/CONTEXT - urban, zero lot, suburban, rural,
DESIGNER - may be a single individual, or an architect, or multiple architects over time, or a design firm.
PATRON/CLIENT - may be anonymous (vernacular), an individual, institution, government, or corporate entity
PERIOD/STYLE - periods are defined relationally as much as by time; styles can be revisited from one epoch to the next [e.g., classical, neoclassical, classical revival]
BUILDING TECHNOLOGY - construction method & materials, technological innovations or significance
SIGNIFICANCE - historical, technological, aesthetic, cultural: first, last, best, tallest, largest, worst, "only example of ___," etc.
CHANGES OVER TIME - alterations, additions, renovations, restorations, catastrophic damage, demolition
WHY WAS IT BUILT? - why was it built in this place, at this time, in this way? What were the alternatives?
WHO BENEFITED? WHO DID NOT?
WHAT IMPACT DID IT HAVE, AS PHYSICAL OBJECT AND AS MEANINGFUL OBJECT?
WHY SHOULD WE CARE NOW?