The Church of St Mary's Conwy was "built around 1190 for the monks of Aberconwy Abbey. The princes of Gwynedd favoured Aberconwy, and many early medieval princes were buried here" (Ross). Wordworth would end up visiting this church inspiring him to write the poem "We are Seven". When Wordsworths poem came out, it was very influencial at the time and many "romantics were fascinated by the idea of children embodying creativity and innocence" (Poetry by Heart). The Church of St Mary's Conwy influenced Wordsworth so much that he included the location in his poem.

A full description can be found here: https://www.britainexpress.com/attractions.htm?attraction=560#:~:text=St...'s%20was%20built%20around,medieval%20princes%20were%20buried%20here.

Bibliography

“Conwy, St Mary's and All Saints Church - History, Travel, and Accommodation Information.” Edited by David Ross, Britain Express, www.britainexpress.com/attractions.htm?attraction=560.