1) Poem 2) Prothalamium 1) Poetry by Edmund Spenser 
Prothalamion, the commonly used name of {sic|hide=y|Prothalamion; or, A Spousall Verse in Honour of the Double Marriage of Ladie Elizabeth and Ladie Katherine Somerset}, is a poem by Edmund Spenser (1552-1599), one of the important poets of the Tudor Period in England. Published in 1596 (see 1596 in poetry), it is a nuptial song that he composed t...
song or poem celebrating a coming marriage
see Epithalamion.
• (n.) Alt. of Prothalamium
Similar to epithalamion but written prior to the wedding in question. In 1596 Spenser published Prothalamion to celebrate the double marriage of Lady Elizabeth and Lady Katherine - daughters of the Earl of Worcester.
prothalamium noun a song in celebration of a marriage
a song or poem written to celebrate a marriage.