YOU SAID:
I will visit Saint Peter cathedral tomorrow morning
INTO JAPANESE
明日の朝、聖ペテロ大聖堂に行きます
BACK INTO ENGLISH
I'm going to St. Peter's Basilica tomorrow morning
INTO JAPANESE
明日の朝、サンピエトロ大聖堂に行きます
BACK INTO ENGLISH
I'm going to St. Peter's Basilica tomorrow morning
That didn't even make that much sense in English.