Descriptive Attribute	Value(s)
Top (m)	Opening elevation: 891.634 m.
Location	To the east of the main Propylaeum Stairway and to the west of Room 2.
Stage Description	Original doorways are modified with the installation of bars across the newly built up thresholds.
Size	1.55 m north south-by-1.10 m east west.
Stage	Stage 5d
Underlies	Locus 10 collapse and debris.
Phase Description	Phase VII: Roman mid CE 2nd c. repairs following a more collapse. Building of the Propylaeum Central...
Bottom (m)	Closing Elevation: 891.634 m.
Overlies	The sidewalk of the street.
Phase	VII
Cuts	None.
Description	The threshold interior is composed of one rectangular limestone block measuring 1.09 m –by- 0.20 m. (The second block to the east is missing) At 0.275 m above this or on the threshold exterior is the uppermost threshold block 1.62 m in length-by-0.33 m in width. It has ten bronze pins mortared in place each measuring 0.04 m-by-0.025 m in width set 0.0165 m apart. Below this, 0.15 m, on the street side are two limestone ashlars—the west ashlar is 0.40 m-by-0.48 m, and the second is 0.49 m-by-0.42 m. Set next to these is a limestone stretchers 0.74 m-by-0.37 m. In front of these is a sandstone block with a doorjamb—the jamb measures 0.09 m-by-0.075 m. This block also has a horizontal groove 0.07 m in depth with a trough measuring 0.67 m-by-0.15 m. Next to the doorjamb block to the east is a sandstone block measuring 0.87 m-by-0.64 m. This doorway measures 1.45 m north south-by-1.50 m east west.
Abuts	Loci 7 and 13 the east and west doorjambs.
Bonds to	None.
Combined with	Doorway #2 of East Propylaeum Room 2, and Doorway #3 of East Propylaeum Room 3.
Definition	Threshold of Doorway #1, Propylaeum East Room 1
Architectural or Soil Locus?	Architectural