After the failure of the crusade, John travelled throughout Europe seeking assistance, but found support only from Frederick, who then married John and Maria's daughter Isabella II in 1225.
在十字军失败以后，约翰走遍欧洲寻求援助，但是只从腓特烈那里获得了支持，后者之后于1225年迎娶了约翰和玛丽亚的女儿伊莎贝拉二世。