Egyptian Hieroglyph O1: House plan
KEMET VAULT / HIEROGLYPH REFERENCE / SOURCE-REVIEWED SIGN
Gardiner O1 depicts the plan of an enclosed building and is encoded as U+13250. The Unicode character record classifies the sign as a logogram for pr, meaning a house or domain. It is an instructive contrast to familiar one-consonant phonograms: one recognizable plan can stand for a complete Egyptian word rather than one sound alone.
At-a-glance sign record
| Gardiner catalogue | O1 |
|---|---|
| Unicode | U+13250 |
| Sign family | O · Buildings and structures |
| Common function | Logogram |
| Conventional value | pr (‘house’, ‘estate’ or ‘domain’) |
Recognising the sign: shape and variants
The compact rectangular outline evokes an architectural plan rather than a perspective view of a modern house. Egyptian writing drew from familiar objects but used conventional forms. An encoded sign is a stable reference for digital text; in actual stone relief or ink manuscripts, proportion and orientation could vary. Do not mistake similar rectangular enclosures for the same sign without considering other marks and the wider inscription.
How the sign works in Egyptian writing
As a logogram O1 can write pr, a word associated with a house, domain or estate. It is not the English letter P and not a blanket translation for every building shown in Egyptian art. Words and compound expressions can extend the sense of pr. The famous Egyptian designation pr-ꜥꜣ, conventionally ‘great house’, later became associated with the ruler in the development of the word pharaoh. That development belongs to historical vocabulary and context; the isolated O1 sign does not by itself name a king.
A reading exercise, with its limits
Reading exercise: identify O1 as the house-plan logogram and record the transliteration pr before attempting an English gloss. Compare that with how the owl G17 contributes only m and how the mouth D21 contributes r. Do not construct an English sentence by substituting ‘house’ every time you encounter the rectangular sign; check whether pr is part of a larger expression and what other signs accompany it.
Compare it with other genuine signs
Compare O1 with O1A, which Unicode lists separately and connects to the expression pr-ꜥnḫ, the ‘house of life’. The two are visually and conceptually related but not interchangeable codepoints. Another useful comparison is between O1 and N5, the sun disk: both may be used as logograms, although their semantic fields are architectural and solar respectively. The distinction explains why the standard Gardiner code is indispensable for research.
What this sign cannot tell us
The meaning of pr is broader than the modern English idea of a private home. An elite estate, administrative establishment or an institutional ‘house’ requires contextual translation. A Unicode symbol also provides no proof of where a particular inscription was carved or who owned the structure it mentions.
A common question about O1
What does the O1 house hieroglyph stand for?
Its standard logographic value is pr, commonly ‘house’ or ‘domain’. Longer expressions and archaeological context determine the appropriate translation.
Verified references and further reading
This dossier uses the official Unicode sign identification and academic explanations of Egyptian writing. It is an educational sign-level reference, not a claim to decipher a specific unexamined monument or recover a lost pronunciation.
- Unicode Consortium, Egyptian Hieroglyphs character names and standard values (including O1)
- UCL Digital Egypt, The System of Egyptian Hieroglyphic Writing
- UCL Digital Egypt, a worked introduction to phonograms and meaning signs
- UCL Digital Egypt, Egyptian sound-sign reference
Browse the original 136-sign Hieroglyphic Explorer or read the source-based study of Egyptian scribes and scripts for wider historical context. The explorer is an index; individual profiles provide dedicated research guidance for the six reviewed signs.
Evidence review: 3 November 2026. Unicode identity and proposed standard sign value checked; actual inscriptions can have contextual or orthographic variation.