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The height of production of Goryeo [[celadon]] wares, and the invention of moveable type, took place in the 12th-13th centuries.

The height of production of Goryeo [[celadon]] wares, and the invention of moveable type, took place in the 12th-13th centuries.

Goryeo was invaded by the [[Liao Dynasty]] ([[Khitans]]) in the 990s, and by the [[Mongols]] beginning in [[1231]].<ref>Rawski, 130.</ref> The kingdom fell under Mongol control in [[1259]], but the dynasty is considered to have continued until 1392, when it was succeeded by the [[Joseon Dynasty]].

Goryeo was invaded by the [[Liao Dynasty]] ([[Khitans]]) in the 990s, and by the [[Mongols]] beginning in [[1231]].<ref>Rawski, 130.</ref> Mongol forces invaded Korea six times in the 1230s-1250s; though Goryeo initially attempted to sue for peace, it later turned to active resistance, holding off the Mongol invasions for nearly three decades before finally agreeing to acknowledge Mongol authority or superiority, so long as the Mongols withdrew from Korean soil.<ref>Ji-Young Lee, “Diplomatic Ritual as a Power Resource: The Politics of Asymmetry in Early Modern Chinese-Korean Relations,” ''Journal of East Asian Studies'' 13 (2013), 317.</ref> Despite this submission to Mongol suzerainty, the dynasty is considered to have continued until 1392, when it was succeeded by the [[Joseon Dynasty]].

In [[1370]], two years after the founding of China's [[Ming dynasty]], [[King Gongming]] became the first king of Goryeo to receive investiture from the Ming.<ref>Tomiyama Kazuyuki, ''Ryûkyû ôkoku no gaikô to ôken'', Yoshikawa Kobunkan (2004), 34.</ref>

In [[1370]], two years after the founding of China's [[Ming dynasty]], [[King Gongming]] became the first king of Goryeo to receive investiture from the Ming.<ref>Tomiyama Kazuyuki, ''Ryûkyû ôkoku no gaikô to ôken'', Yoshikawa Kobunkan (2004), 34.</ref>