Isdhoo or Isdū (Dhivehi

Dhivehi language

Maldivian is an Indo-Aryan language predominantly spoken by about 350,000 people in the Maldives where it is the national language. It is also the first language of nearly 10,000 people in the island of Minicoy in the Union territory of Lakshadweep, India where the Mahl dialect of the Maldivian...

: އިސްދޫ) is one of the inhabited islands of Haddhunmathi Atoll

Haddhunmathi Atoll

Haddhunmathi or Haddummati Atoll is an administrative division of the Maldives. It corresponds to the natural atoll of the same name.It is mostly rimmed by barrier reefs, the broadest of which are topped by islands...

, administrative code Laamu.

This island has important ruins from the historical Maldivian Buddhist

History of the Maldives

The Maldives is a nation consisting of 26 natural atolls, comprising 1192 islands-Historical setting:Since very ancient times, the Maldives were ruled by kings and occasionally queens ....

 era. These ruins include one of the largest stupa

Stupa

A stupa is a mound-like structure containing Buddhist relics, typically the remains of Buddha, used by Buddhists as a place of worship....

s so far found in the Maldives.

Isdū Lōmāfānu

Lōmāfānu

Lomafanu

Lōmāfānu or Loamaafaanu, also known by the Sanskrit name Sasanam, are Maldivian texts in the form of copper plates on which inscriptions have been added. The oldest of these plates dates from the twelfth century AD....

 are ancient royal edicts written on copper plates. Lōmāfānu edicts were etched on long copper plates held together by a ring of the same metal. The lōmāfānu were written in the curly Evēla form of the Divehi akuru

Dhivehi Writing Systems

The Dhivehi or Divehi writing systems are the different scripts used by Maldivians during their history. The early Maldivian scripts fell into the abugida category, while the more recent Taana has characteristics of both an abugida and a true alphabet...

 or old Maldive alphabet and they are very important documents in the History of the Maldives

History of the Maldives

The Maldives is a nation consisting of 26 natural atolls, comprising 1192 islands-Historical setting:Since very ancient times, the Maldives were ruled by kings and occasionally queens ....

.
The oldest lōmāfānu that have hitherto been found and preserved are from Malé, the royal capital, and from the islands of Isdū and Dambidū in Haddhunmathi Atoll

Haddhunmathi Atoll

Haddhunmathi or Haddummati Atoll is an administrative division of the Maldives. It corresponds to the natural atoll of the same name.It is mostly rimmed by barrier reefs, the broadest of which are topped by islands...

, where there were large Buddhist monasteries. These copperplates were issued at the end of the twelfth century AD.
These (lōmāfānu), make it clear that the general conversion from Buddhism to Islam was ordered by the king. Thanks to the lōmāfānu it is also known that the monasteries in Haddummati Atoll (Satu Duvu) were of great importance in the ancient Buddhist Kingdom of the Maldives.

According to the Isdū Lōmāfānu, monks from monasteries of the southern atoll of Haddhunmathi were brought to Malé and beheaded.