Time lapse Of 1480-90, Castle

The castle was originally a basic, 5-storied Irish tower house which was built circa probably by Toirdhealbhach Donn Ó Briain of the O'Brien family, one of the last of the High Kings of Ireland and a direct descendant of Brian Boru.
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https://en.wikipedia.org/wiki/Leamaneh_Castle

In 1543, Turlogh Donn's son, Murrough surrendered his title of King to Henry VIII and was created in 1st Earl of Thomond and Baron Inchiquin. In 1550, Murrough gave Leamaneh to his third son, Donough. Donough was hanged in Limerick in 1582 as a rebel
Manor house

In 1639, Donough's grandson, Conor O'Brien married Máire ní Mahon (MacMahon). She became one of the most famous women in Irish folklore who, due to her flaming red hair, was commonly known as Máire Rúa ("Red Mary"). She was born in 1615 or 1616. Her father was Sir Torlach Rúa MacMahon, Lord of Clonderlaw and her mother was Lady Mary O'Brien, daughter of the third Earl of Thomond. Her first husband, Daniel O'Neylan (also sometimes written O'Neillan or Neylan) of Dysert O'Dea Castle in north Clare died young and upon his death, she gained control of his substantial estate and a £1,000 fortune. This wealth enabled her and Conor to build a more comfortable mansion on to the tower house.

Part of the tower house was demolished and replaced by a 4-storied mansion around 1648. Máire accompanied her husband on raids against English settlers. In 1651, he was mortally wounded fighting on the Royalists' side at Inchicronan (Crusheen). Reportedly, immediately after her husband's death, the widow, realizing that the punishment for his rebellion against the English would be the forfeiture of their property, drove to Limerick and offered to marry any Cromwellian officer who would take her hand. (This is refuted in other versions of the story which state that Máire Rúa didn't marry until 1653, two years after Conor's death.)

General Ludlow, who commanded the English Parliament forces at Inchicronan subsequently conducted counter-insurgency operations in the Burren, making his well-known statement about the area's barrenness. He went on to say about Leamaneh "and finding it indifferent strong, being built with stone and having a good wall about it, we put a garrison into it and furnished it with all things necessary".[2]:40

Rúa's third husband, Cornet John Cooper was a Cromwellian soldier and through this marriage she successfully retained her estates. Cooper left the army and amassed some wealth through land and property speculation. However, he later ran into financial difficulty and, as a result, the estate which he had married into at Leamaneh, which he under law now owned through his wife, was mortgaged to repay his debts.

In the 1660s, Cromwellian troops were stationed on and off at Leamaneh. Máire Rúa's son, Donagh or Donough (after 1686 Sir Donat) found the tower and manor damaged but stayed there until 1684/1685, when he moved the family seat from Leamaneh to the much larger Dromoland Castle in Newmarket-On-Fergus, south of Ennis.

Although Máire Rúa's children from her first marriage to Daniel O'Neylan (or O'Neillan) were raised Catholic, Sir Donagh/Donat was brought up as a Protestant and eventually became the "richest commoner in Ireland." He built "Sir Donat's Road", connecting Killnaboy and Leamaneh, a toll road, the flanking stone walls of which are still visible in places. The gate houses at which tolls were collected have since been demolished.

He served as Sheriff of Clare in 1690 and as MP for Clare from 1695 to 1713. He died in 1717. By 1678, the estate had been increased to over 10,000 acres of land.
Recent past
Three-quarter view of the castle

Leamaneh had various occupants in subsequent years. However, the house finally fell into ruin at the end of the 18th century. The barbican-like gates which adorned the entrance to the property were moved to Dromoland Castle in 1906 or 1908 by Lord Inchiquin. They are still there.

The most elegant of the fireplaces was relocated to the "Old Ground Hotel" in Ennis.