Niue, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar is the circulation currency for daily transactions, while the government also authorises legal tender coins in the Niue Dollar currency for collector's purposes.
A number of mints issue a large variety of commemorative and collector coins under the authority of Niue. One of them is the Czech Mint, which uses not only standard bullion sizes but also some formats based on the Czech Gold Ducat, including 100 Ducats weighing a massive 348.5 grams.
The coins are "Non-Circulating Legal Tender" (NCLT) and not bullion because they are issued at prices much higher than their bullion value and are targeted at collectors who appreciate them for their artistic or sentimental value, and not at bullion investors.
The Mint says about this coin:
John Amos Comenius (Czech: Jan Amos Komenský) ranked among the few figures in Czech history whose significance reached far beyond the country’s border. His name is lauded along with the greatest names of Europe’s and, indeed, the world’s cultural history. He is best known as the founder of modern teaching methods, but he was also a prominent philosopher, writer and church official. His written works are sophisticated in style, yet easy to read.
Komenský’s correspondence with European scholars and artists of that time serves as indirect evidence of his stature. His efforts in the political arena, part of which was his faith in visionaries‘ prophecies, scored the least success. Conversely, his programme aiming to edify humankind, gradually evolving in his writings and based on education and the idea of perpetual peace, has turned out truly timeless. | 
Search for Niue: One Hundred Ducats 2011 John Amos Comenius on eBay 