Foundation Chronograms on Mosques and Buildings

What Is a Building Chronogram?

It is a date written in words. The letters of a phrase carry numbers in the abjad system. Their sum is the year the building was founded or finished.

The idea is the same as in the general chronogram guide. What changes is the setting. A building chronogram is fixed in stone, wood or tile, so it can be read again where it was placed.

Encyclopaedia Iranica explains why such lines were common. Tombstones and foundation plaques needed short, elegant inscriptions, and patrons paid poets for them.

Where Do Date Inscriptions Sit on a Building?

The date was placed where visitors and worshippers would see it. The documented cases cluster in a few spots.

• Over the entrance. The two forts of Al Ain carry their verses on wooden panels above the south gate.
• Above the mihrab. A Persian chronogram sits above the prayer niche of the Qubai Mosque in Shikarpur, Sindh.
• On columns. The Sufi Allayar mosque has its date on the columns beside the mihrab, once in ink and once carved.
• On a stone tablet. The Jama Masjid in Hyderabad has a three-line Persian text on black basalt above its main door. It contains a chronogram.
• On steps and wells. The Khari Baoli in Delhi once carried two Persian inscriptions, one near the eleventh step and one above the entrance.

Not every building date is a chronogram. The Khari Baoli text spells its year out in words. It says “nine hundred and fifty-eight.” So check for a plain date before you look for a hidden one.

What Words Did Builders Use?

The wording follows a few familiar patterns. Most lines name the building, the builder or the happy occasion, and then give the year.

Iranica adds that the most memorable architectural mottoes often point to the function of the building. A hospital line might speak of healing, and a gate line of an open door.

How Do You Read One on Site?

Treat the inscription as a small puzzle with a known answer. You already have a rough date for the building, so you can test each guess against it.

1. Look for a plain date first. Many panels give the year in figures near the center.
2. Find the cue. A word meaning “date” or “history” marks where the counting starts.
3. Copy the letters exactly as written. Spellings are often bent on purpose to reach the total.
4. Add the values. Use the Mashriqi table, as explained in the step-by-step reading guide.
5. Check the calendar. A Gulf or Persian inscription usually gives a Hijri year, so convert it before you compare.

For the conversion, multiply the Hijri year by 0.97 and add 622. The Hijri to Gregorian formula page explains the exact method, and the chronogram decoder does both steps at once.

What Do Real Examples Look Like?

The three cases below are documented in published studies. Each total comes from this site’s abjad engine, and each matches the year the source gives.

Example 1: A House of High Standing at al-Jahili Fort

Al-Jahili Fort stands in Al Ain, in the United Arab Emirates. Its inscription is carved on a wooden panel over the south gate, in two lines of four half-verses.

Riham Miqdadi translates it as a door of goodness opened. It names a house of high standing built by Zayed bin Khalifa.

The cue word “arekho,” meaning date, comes before the last half-verse. The numeral 1316 sits at the center of the panel.

دار جد شاد زايد بن خليفه

The total, 1316 AH, is about 1899 CE. The paper dates the fort’s second building phase to 1898 to 1899.

Example 2: The Happy Day at the Eastern Fort

The Eastern Fort lies a short way from al-Jahili, in the same oasis. Its panel also sits over the south gate, and its cue word is “at-tarekho,” meaning history.

The lines say that history celebrated the happy day when Sultan ibn Zayed built the house of the kingdom. The date written at the center is 20 Sha’ban 1328.

بااليوم السعيد شاد بيت الملك سلطان ابن زايد

The sum is 1328 AH, which is 1910 CE.

Two small choices make it work. The word for “day” is written with two alifs. The words “son of” are written as ابن, with an alif, not as بن.

The two forts share phrases, so Miqdadi suggests one poet may have written both panels. Only twelve years separate the buildings.

Example 3: A Subtraction on a Mosque Column

The Sufi Allayar mosque has a short inscription on the columns beside its mihrab. Its text does not give a phrase. It gives an instruction in letters.

In English it reads: subtract from the letters dal and ghayn the number six and the letter mim. The three letters are د (4), غ (1000) and م (40).

4 + 1000 = 1004; 1004 − 6 = 998; 998 − 40 = 958

The result, 958 AH, runs from January to December 1551. The add and subtract devices guide explains this kind of instruction.

Who Wrote These Lines?

Some were written by court poets, and some by local scholars or the patron’s friends. The two Al Ain panels share phrases, so one hand may lie behind both.

The poet worked backward from the year. He needed a line that praised the building, named the patron, and also reached the exact total.

Carvers and calligraphers then cut the letters into wood or stone. Their choices, such as a doubled alif, could change the sum. So the poet’s spelling had to be followed with care.

How Do Builders’ Chronograms Differ From Death Chronograms?

A building line celebrates and credits. A grave line mourns. Both hide a year in letters, but their moods and their wording differ.

Building lines tend to name the patron, since the patron paid for the work. The death date chronograms guide covers the sadder register.

Building lines also face a practical limit. Stone is hard to correct, so a mistake in the spelling stayed on the wall for good. That is one reason checks such as a numeral date beside the verse were useful.

Why Can Two Dates Disagree?

A single building can carry or inspire more than one date. This is normal, and it is why a reader should treat a total as a clue and not as proof.

• Founding and finishing. A line may record when work began, or when it ended.
• Later repair. A plaque may mark a restoration, not the first build.
• Damage. The Qubai Mosque inscription in Shikarpur is damaged. One reading gives 1260 AH, and another figure on the same page is 1269 AH.
• Copying. Some panels were moved or hung later, so they may not date the walls around them.

Miqdadi gives a warning of this kind about a small wooden panel at a mosque in Damietta, Egypt. It is hung on the wall, so it may have been placed after the building was finished.

How Common Were Building Chronograms?

They were widespread across the Arabic-script world. A study of 154 dated inscriptions on Islamic buildings in Egypt found several kinds of chronogram.

Another survey of Arabic poetry collections found more than fifty examples tied to mosques, schools, baths, palaces and houses. They ranged from 940 AH to 1367 AH.

For regional traditions, see the guides to Ottoman chronograms, Arabic chronograms and Mughal chronograms. The Persian and Urdu guides cover the languages themselves.

Can You Write One for a Building Today?

Yes, and the method is the reverse of reading. Start with the year, then look for words that suit the building and add up to it.

The writing guide shows the steps. Test the total with the phrase value calculator. Then check each spelling against the Urdu and Persian letter rules.

Sources and Further Reading

• Abjad Numerals as an Absolute Dating Method: Forts from Al-Ain, UAE, Riham H. Miqdadi, Mediterranean Archaeology and Archaeometry 20(3), 2020. The al-Jahili and Eastern Fort panels, Tables 2 and 3, and the Egyptian and Damietta notes.
• The mystery of the construction date of the Sufi Allayar mosque, society.uz (2023). The column inscription and the 958 AH reading.
• Madda Tarik (chronogram), Encyclopaedia Iranica, by Paul E. Losensky (2006). Foundation plaques, public works and mottoes that point to function.
• A Historic Mosque in Shikarpur, Zulfiqar Ali Kalhoro, Youlin Magazine. The Qubai Mosque chronogram above the mihrab and its damaged reading.
• Jama Masjid, Hyderabad, Wikipedia. The basalt tablet and its chronogram of 1006 AH.
• Khari Baoli, Wikipedia. The two step-well inscriptions and the year written in words.
• Abjad values come from this site’s tested engine. See the methodology.

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