を[経「へ」]て => After A N1
Time, Situation
中 => Throughout, all over, during the course of N5
Time
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
[中心「ちゅうしん」]に => With A as the center N2
Miscellaneous
ところを/ところに/ところへ => At time/situation A N2
Information, Report
へ => Go to N, head to N , Often followed by verbs like 行く/いく, 来る/くる, 向かう/むかう… N5
Particles