Final answer:
The largest political group in the Frankfurt Parliament was the liberal center, a broad faction of liberals and nationalists, within a body of about 800 delegates. They led discussions but lacked dominance and consensus, leading to the parliament's eventual failure.
Step-by-step explanation:
The largest political group in the Frankfurt Parliament (1848-1849) was the liberal center, which was not a formal party in a contemporary sense but rather a faction composed of multiple liberal and nationalist groups. While exact numbers for this group are not consistently documented, this faction was the most significant in terms of setting the agenda and leading discussions, even though it often suffered from internal divisions and lacked a consensus on various issues. The Frankfurt Parliament had about 800 delegates elected from all over the German states, representing a range of ideological perspectives. However, no single faction had the clear dominance to effect change unilaterally, and the Frankfurt Parliament ultimately failed to achieve its goals of German unity and a liberal constitution.