在罗马法上,非婚生子女的范畴经历了从最初与私生子并立,到后期将私生子涵纳其中的转变。其间,罗马法上还出现了另一种非婚生子女类型即自然子女。它与私生子共同构筑了新的非婚生子女范畴。因受基督教平等理念的影响,罗马法平等地赋予婚生或非婚生(自然子女和私生子)生来自由人身份。但因基督教圣洁思想的影响,私生子无权与自然子女同等地适用非婚生子女的准正、享有对生父遗产的继承权。 In Roman law, the categories of children born out of wedlock have undergone a change from being initially tied to their illegitimate children and ending up with illegitimate children. In the meantime, another type of child born out of wedlock, the natural child, appeared in Roman law. It and the illegitimate child together to create a new category of illegitimate children. Because of the influence of the Christian concept of equality, the Roman law gives equal birth or non-marital birth (natural child and bastard) to human rights. However, due to the influence of Christian holiness, the illegitimate child has no right to apply the right of illegitimate children equally to the natural child and enjoys the right of inheritance to the biological father.