And, in case you didn't know what a lai was (I didn't!), here is what wikipedia says about it:
A Lai was a song form composed in northern Europe, mainly France and Germany, from the 13th to the late 14th century.
The poetic form of the lai usually has several stanzas, none of which have the same form. As a result, the accompanying music consists of sections which do not repeat. This distinguishes the lai from other common types of musically important verse of the period (for example, the rondeau and the ballade). Towards the end of its development in the 14th century, some lais repeat stanzas, but usually only in the longer examples. There is one very late example of a lai, written to mourn the defeat of the French at the Battle of Agincourt (1415), (Lay de la guerre, by Pierre de Nesson) but no music for it survives.
That's me. Ancient and completely unorganized!