1801
ID: 675
Pope Pius VII signs Concordat with Napoleon, restoring Catholic Church in France
ID: 675
1801
ID: 676
Gauss publishes Disquisitiones Arithmeticae founding modern number theory with congruence notation
ID: 676
1801
ID: 677
Piazzi discovers Ceres; Gauss calculates orbit from minimal data, successfully predicts location
ID: 677
1801
ID: 678
London population 800,000; estimated 100,000 people vaccinated by this year
ID: 678
1801
ID: 5538
Sinyu Persecution - hundreds of Korean Catholics martyred including Chinese priest Zhou Wenmo
ID: 5538