In the first instance, it is important that there is an understanding of the particular character of the building, how it has evolved over time and how its sits within its surroundings.
Yn y lle cyntaf, mae'n bwysig meddu ar ddealltwriaeth o gymeriad penodol yr adeilad, sut y mae wedi datblygu dros amser a sut y mae'n cyd-fynd â'i leoliad.