Gernon, an English-born judge and resident of Limerick, wrote a similar description in 1620: Lofty building of marble; in the High Street it is built from one gate to the other in a single form, like the Colleges in Oxford, so magnificent that at my first entrance it did amaze me. In the 15th and 16th centuries, Limerick became a city-state isolated from the principal area of effective English rule -the Pale. Nevertheless, the Crown remained in control throughout the succeeding centuries. During the Reformation tensions arose between those loyal to the Catholic Church and those loyal to the newly established state religion — the Church of Ireland. Siege and treaty Limerick was besieged several times in the 17th century. The first was in 1642, when the Irish Confederates took the King John's Castle from its English garrison. The city was besieged by Oliver Cromwell's army under Henry Ireton in 1651. The city had supported Confederate Ireland since 1642 and was garrisoned by troops from Ulster. The Confederates supported the claims of Charles II to the English throne, and the besiegers fought for a parliamentary republic. Famine and plague lead to the death of 5,000 residents before heavy bombardment of Irishtown led to breach and surrender in late October of that year. In the Williamite war in Ireland, following the Battle of the Boyne in 1690, French and Irish forces (numbering 14,000) regrouped in behind Limerick's walls. Time and war had led to a terrible decay of the once proud fortifications. The occupying armies are recorded as claiming that the walls could be knocked down with rotten apples. The Williamite besiegers, while numbering 20,000, were hampered by the loss of their heavier guns to an attack by Patrick Sarsfield. In fierce fighting, the walls were breached on three occasions, but the defenders prevailed. Eventually, the Williamites withdrew to Waterford. William's forces returned in August 1691. Limerick was now the last stronghold of the Catholic Jacobites, under the command of Sarsfield. The promised French reinforcement failed to arrive from the sea, and following the massacre of 850 defenders on Thomond Bridge, the city sued for peace. On 3 October 1691 the famous Treaty of Limerick was signed using a large stone set in the bridge as a table. The treaty allowed the Jacobites to leave under full military honours and sail to France. Two days later French reinforcements finally arrived. Sarsfield