In principle, all diocesan income was paid into a common fund, and divided into four fixed shares for each main area of expenditure; the Bishop himself; the cathedral clergy; the fabric and lighting of cathedral and city churches; and charitable donations. Many diocese already held substantial endowments, but income increased enormously with the Peace of the Church; partly due to imperial subsidies in kind, but mainly from private bequests and regular private benefactions (often called 'first fruits'); although at this date, tithe was never paid to the church. In addition, many individual landowners supported private chapels and oratories on their own property; and endowed independent charitable institutions, and eventually monasteries and nunneries too.