The Pact of Jaen (1246) between King Ferdinand III of Castile and Mohammad Al-Hamar, the first Nasrid ruler, committed the Emir to support his ally, the Christian king. Thus, in 1248, Muslim troops from the Kingdom of Granada were placed at the disposal of Ferdinand III for the Christian reconquest of Seville. The friendship between the two sovereigns was such that after the death of Fernando III in 1252, the Emir had 100 white candles lit on his grave every year. The "Concerted Peace" between the Christian and Muslim kingdoms of the Iberian Peninsula (1350-1460) allowed for a wide range of exchanges. During this period, Mohammed V (8th Amir) befriended King Pedro I of Castile and helped him build the Mudéjar palace of the Alcazar in Seville. At the time of the fall of Granada, the Great Captain of the Christian troops, Gonzalo de Córdoba, developed mutual esteem for the last King Boabdil.