Editing 984 (section)

=== By topic ===

==== Technology ====
* [[Science and technology of the Song dynasty#Civil engineering|Qiao Weiyue]], a Chinese engineer, innovates the first known use of the double-gated canal [[Lock (water navigation)#Pound lock|pound lock]] during the [[Song dynasty]], for adjusting different water levels in segments of the [[Grand Canal (China)|Grand Canal]] in [[China]].

==== Religion ====
* [[August 20]] &ndash; Pope [[Pope John XIV|John XIV]] dies a prisoner in the [[Castel Sant'Angelo]] at [[Rome]] after a 1-year reign, having either been murdered or [[Starvation|starved]] to death.<ref>Eleanor Shipley Duckett, ''Death and life in the Tenth Century'', (University of Michigan Press, 1967), p. 110.</ref>
* Anti-Pope [[Antipope Boniface VII|Boniface VII]] returns from [[Constantinople]] and gains support from the powerful Roman [[Crescentii]] family. He takes hold of the [[Throne#Papal Thrones|papal throne]].</onlyinclude>