What does Office Building look like on HTC?

On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.

When did HTC add Office Building?

HTC first drew Office Building in Sense 7, released March 30, 2015.

HTC Corporation has shipped 2 versions of Office Building. Each is dated, so you can see when the design changed.

HTC

HTC Corporation has drawn Office Building 2 times. Every revision HTC has shipped is below, newest first.

What does Office Building look like on HTC?: On HTC it is the design shipped in Sense 8, shown above at full size. Older revisions are listed beneath it.
When did HTC add Office Building?: HTC first drew Office Building in Sense 7, released March 30, 2015.
How many times has HTC redrawn Office Building?: HTC Corporation has shipped 2 versions of Office Building. Each is dated, so you can see when the design changed.

HTC artwork for this emoji spans 2015 to 2016.