Articles on the origins and nature of 'nobility', its relationship with the late Roman world, its acquisition and exercise of power, its association with military obligation, and its transformation into a more or less willing instrument of royal government. Embracing regions as diverse as England (before and after the Norman Conquest), Italy, the Iberian peninsula, France, Norway, Poland, Portugal, and the Romano-German empire, it ranges over the whole medieval period from the fifth to the early sixteenth century. Contributors: STUART AIRLIE, MARTIN AURELL, T. N. BISSON, PAUL FOURACRE, PIOTR GORECKI, MARTIN H. JONES, STEINAR IMSEN, REGINE LE JAN, JANET N. NELSON, TIMOTHY A REUTER, JANE ROBERTS, MARIA JOAO VIOLANTE BRANCO, JENNIFER C. WARD