In a pivotal moment for both Norse and Irish relations, Glúniairn, the Norse King of Dublin, formally recognized Máel Sechnaill mac Domnaill as the High King of Ireland. This acknowledgment came with significant concessions from the Norse, including the promise to pay taxes and abide by Brehon Law, which was the customary law of the Irish. This agreement not only highlighted the importance of Máel Sechnaill’s influence within Ireland but also underscored the Norse Viking acceptance of integrating with the indigenous governance structures of the Irish. The location of this pivotal agreement, Dublin, will later emerge as a focal point in Irish history and governance.

The recognition from Glúniairn was particularly noteworthy given the tumultuous relationship between the Norse settlers and the Irish populations. The Norse had established control over Dublin in the late 9th century, and this event can be seen as a transitional moment where the Vikings began to seek a more stable coexistence with the Irish. The acceptance of Brehon Law indicated a willingness to respect local customs and legal traditions, which were essential to establishing a more integrated society.

Such foundations contributed not only to the social fabric of the city but also set the stage for Dublin's future prominence as a political, economic, and cultural hub. The incorporation of tax obligations paved the way for a more structured governance model, crucial for the development of Dublin’s urban landscape and its administration under both Norse and Irish influences.