The Merman's Children.
We have read about Copenhagen in the twentieth century here. In the fourteenth century:
stately moats, walls and watchtowers guard the city;
thatched, wooden houses are jammed along narrow, crooked, dirty streets crowded with drably clad laborers;
jugglers and fiddlers wear flamboyant rags;
there are also beggars, foreign sailors, mounted knights, rich merchants, courtesans in litters, swine, poultry, dogs and children;
wagons force their way between pedestrians;
sounds are voices, feet, wheels and hammers;
smells are smoke, dung, offal and graveyards;
"Here was the womb of the future." (p. 143)
Indeed but - time travelers and sf readers - let's escape back to that future!