This is a pictograph of a porter's lodge. Therefore, it is the noun porter's lodge.
Illustrative Text Reference:
Mohenjo-daro: Seal: M-1367 a: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 178: Collections in Pakistan: Suomalainen Tiedeakatemia.
Comment:
A similar porter's lodge can be seen in a projection by John Marshall of House VIII at Mohenjo-daro.¹
Image Credit:
Indus Script Sign Number 2661: List of Sign Variants: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.
Note:
1. Drawing: House VIII, HR Area, Mohenjo-daro: John Marshall, 1931, Mohenjo-daro and the Indus Civilization, Volume I, Plate IV, pp. 18 -19: Arthur Probsthain, London.